Malicious PDF — malware analysis report

Static analysis result for SHA-256 b87ee7d8ee0d9223…

MALICIOUS

PDF

109.6 KB Created: 2021-05-26 01:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ddfeb783b153770a3ad80f2d658bb755 SHA-1: dd3ebd6da53e58bacd4e28cd68be14ac69913457 SHA-256: b87ee7d8ee0d9223d70e3c172759189ea5be044f9a6e26d1bef853e3f2b966d2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9697

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dugedepap.ru/strik?utm_term=june+malayalam+movie+english+subtitles PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386848/normal_603e0d086e52b.pdfIn PDF document text
    • https://fowedejuman.weebly.com/uploads/1/3/4/5/134518602/1a625dec08d337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468812/normal_602ebc44c8216.pdfIn PDF document text
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/xovetamubik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_600c70482eaed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489409/normal_5ff07134e54c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446649/normal_6017b2877ac70.pdfIn PDF document text
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/xovutak_levuvi_mabagefigofir.pdfIn PDF document text
    • https://sujofunipus.weebly.com/uploads/1/3/4/5/134502209/negukoxovojis-kibopom-boboguruj-wukated.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_60266322daf98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460465/normal_60240c433c5b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_5fd99dff76cc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479441/normal_603a4f260362e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_6050b7025ba94.pdfIn PDF document text
    • https://pexerewiku.weebly.com/uploads/1/3/5/3/135313352/9240442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501029/normal_603634d8c9368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_5fd992c2be4c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460058/normal_60208e591f96d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413566/normal_60264d045306d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392658/normal_6064b989cb57e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6a761929-9527-4b79-8c0f-298b71820fe5/kimumix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/125705df-361e-4735-a18d-3051f74557f2/93085520912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6ad709-435e-4fe4-9d1d-f100b3aaf88d/american_standard_80_furnace_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/samsung_xpress_c460fw_toner_refill.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/html_to_c._net.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/game_battlefield_bad_company_2_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/metal_gear_solid_4_game_informer_review.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86E 3912 bytes
SHA-256: ad12c7de05d881b9fd76064f395e9786f36a1c596303d32f4bac6ab5a67a5066
font_01_sfnt_off00010624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10624 5176 bytes
SHA-256: aabcd3406f3b1f21de9c85e8c590220f2bd60cea8277e6e3defc6f518a2ce479
font_02_sfnt_off0001179b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179B 7908 bytes
SHA-256: 4afbc52aea6faa7bcedeeabbad6333966a733977bdff2fe738b96bf927becbf4
font_03_sfnt_off000132f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F0 13864 bytes
SHA-256: 20b6d9b3b45b656aa93f4c9a33bcece2da6d3424d59f736fa7da2200b1618bfd
font_04_sfnt_off0001590a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1590A 11100 bytes
SHA-256: 122fd53c2b5ff322a8d00ae44235f0a85567ccc3cf330ed54cc7176270ab8372
font_05_sfnt_off00017f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F44 17404 bytes
SHA-256: d8fe4a0acc8a0a82006f97dfae9e5438527df8d58f7349d410d6bf68755a88d9
font_06_sfnt_off00019887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19887 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378