Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7216d07f1ec284e…

MALICIOUS

PDF

86.7 KB Created: 2021-03-26 19:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1936aac42ca09ac9e55b3a60c10352f7 SHA-1: 50506488f6ba2f0bc99db0c26a0c3fa96e4e5bcc SHA-256: e7216d07f1ec284e57f2fc57a4858f5d649f608a6c21355108e0b34f9a8de70a
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 0.9995

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://ponafet.ru/award?keyword=bacaan+sholat+dan+artinya+sesuai+sunnah+pdf PDF link annotation
    • https://cdn.sqhk.co/dijogiper/Tiitphb/pimasep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460255/normal_601151506a527.pdfIn PDF document text
    • https://zuxijonimobazi.weebly.com/uploads/1/3/5/3/135351106/lirek.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/GicRghq/bar_dice_games_with_5_dice.pdfIn PDF document text
    • https://cdn.sqhk.co/xisiwuba/fhcjkpF/84830125083.pdfIn PDF document text
    • http://uablog.website/how_to_open_a_sentry_safe_ms0100_without_combinationeyixl.pdfIn PDF document text
    • https://cdn.sqhk.co/xonizarisu/hi2heMm/taxodaxuvud.pdfIn PDF document text
    • https://jajipovel.weebly.com/uploads/1/3/4/5/134527293/6812870.pdfIn PDF document text
    • http://my-credit.info/57359886689namuu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444643/normal_6013418d7fa8d.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/fRB0Vgj/strikers_1945_2_psx_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/vofosutuwo/his1jb8/vpn_connection_virtual_private_network.pdfIn PDF document text
    • http://pixell.store/5088595610gprb8.pdfIn PDF document text
    • http://my-favshoph.online/canon_speedlite_430ex_iii-rt_flashgunxzqpb.pdfIn PDF document text
    • https://cdn.sqhk.co/tuvameboroke/jjtijcO/94551319756.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/jijidp1/popcaan_block_traffic_riddim.pdfIn PDF document text
    • https://cdn.sqhk.co/gimiraxu/ifhhfif/91409990322.pdfIn PDF document text
    • https://cdn.sqhk.co/mutuwatu/ohgMuIm/90083752787.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/riloko.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/bivariate_regression_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/banquet_service_training_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/how_to_find_the_exterior_angle_measure_of_a_triangle.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF6 5396 bytes
SHA-256: 3c8ce29f3dc87d3a8ea539fd9c834aeae2a71b6fc022e207150c558ced4acbe9
font_01_sfnt_off0001024f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024F 12752 bytes
SHA-256: c0d551e062c24b0a1d1558d6531e0274d0a35e67d1542f3ed48e548091e766ca
font_02_sfnt_off00012b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3C 19988 bytes
SHA-256: e58dadd07b11f2628ae4fb568f011ada93c8c87ca5a39a1a77f471d0d89e4184