Malicious PDF — malware analysis report

Static analysis result for SHA-256 408f789d300ef667…

MALICIOUS

PDF

92.0 KB Created: 2021-06-06 10:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 31dfaa614ad1283e999ad00dc569962d SHA-1: cedcfb2be9786896db266dbce538f4d7c6fa12dd SHA-256: 408f789d300ef667682633a58f75743fc634b0c38354926fed941aaf6670e040
126 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with multiple URLs, one of which, 'https://laborke.ru/pbw?utm_term=download+epic+battle+simulator+2+for+pc', is presented as a download for a game, likely a lure. The PDF's structure and numerous links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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://laborke.ru/pbw?utm_term=download+epic+battle+simulator+2+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474746/normal_6017b10855358.pdfIn PDF document text
    • https://wovodolu.weebly.com/uploads/1/3/4/8/134861979/4302396.pdfIn PDF document text
    • https://zaduguwage.weebly.com/uploads/1/3/0/8/130874015/1c9a0.pdfIn PDF document text
    • https://pobowapikojuga.weebly.com/uploads/1/3/4/9/134903403/7755497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_606ae68b948cc.pdfIn PDF document text
    • https://fonilukixegob.weebly.com/uploads/1/3/4/8/134884535/ketibikef-bovudupuwita.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4483359/normal_60b0a90ca1077.pdfIn PDF document text
    • https://kakabotosor.weebly.com/uploads/1/3/0/7/130775724/5963103.pdfIn PDF document text
    • https://mumizovis.weebly.com/uploads/1/3/4/3/134350635/6482366.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vadibun.pbworks.com/w/file/fetch/144700479/ouz_atay_olric_kitab.pdfIn PDF document text
    • http://xodelow.pbworks.com/w/file/fetch/144470820/94744874213.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/format_notice_of_meeting_and_agenda_sample.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/w/file/fetch/144697422/81682569303.pdfIn PDF document text
    • http://sokulus.pbworks.com/w/file/fetch/144464913/mecanica_vectorial_para_ingenieros_estatica_8va_edicion.pdfIn PDF document text
    • http://nusometa.pbworks.com/f/65797443136.pdfIn PDF document text
    • http://kinuwibe.pbworks.com/w/file/fetch/144443451/38819520824.pdfIn PDF document text
    • http://ziriwuru.pbworks.com/w/file/fetch/144506118/kudowikedewuwumepibebumif.pdfIn PDF document text
    • http://finebov.pbworks.com/f/nenedisazumibo.pdfIn PDF document text
    • http://muxopal.pbworks.com/w/file/fetch/144480240/hsk_1_workbook.pdfIn PDF document text
    • http://zawepiko.pbworks.com/w/file/fetch/144548997/69889885976.pdfIn PDF document text
    • http://xesimisejek.pbworks.com/w/file/fetch/144557994/lulozozubejowet.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77C 4224 bytes
SHA-256: dbecd1172b4c514ec996f8fa57bfefee256071c51bf7daaee77c0723c94e78f0
font_01_sfnt_off0000f681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF681 5544 bytes
SHA-256: d0f7f6811ff32aaca930d536129e1c2749a9a052b1e456cc6b4fffc18c592284
font_02_sfnt_off00010950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10950 20272 bytes
SHA-256: 918f5a2043a6832b9555d9c02b614d079beb8a2ea99fe2f1da906853fb66b390
font_03_sfnt_off00013c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C61 16644 bytes
SHA-256: b7eed25b704e191cb01a41623c08a130506324bb6b8b027bf02208feed18cd7e
font_04_sfnt_off0001538a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1538A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3