Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2f2df9453f4e89…

MALICIOUS

PDF

87.7 KB Created: 2021-02-20 04:07:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4e1fa951b99f787482cc214a51436ab9 SHA-1: 3f93ed6f16c92192618c02df5cb1100116d9513a SHA-256: 6e2f2df9453f4e8979f7f7b5d226df275c4cc867a312e9fa8cfed7e2e6523995
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or hosting of malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially used as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=footlol+apk+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4527859/normal_5fda803ebfbe5.pdfIn PDF document text
    • https://gosasomaf.weebly.com/uploads/1/3/4/3/134370397/mubipujezabu.pdfIn PDF document text
    • https://kitomejefu.weebly.com/uploads/1/3/4/1/134108571/jabane.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/jLVheBt/ziwomodamegogidififofanix.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/epShheO/fm_scout_2021_wonderkids.pdfIn PDF document text
    • https://dasewukux.weebly.com/uploads/1/3/5/9/135956745/bagafi.pdfIn PDF document text
    • https://cdn.sqhk.co/wafizogep/g6jaNhh/74238049415.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/agi2BQd/dimivewibenigefajebaluwo.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/9AIidQx/doketipudigezerelelavubax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468259/normal_6002b8c01beb4.pdfIn PDF document text
    • https://poteluteko.weebly.com/uploads/1/3/1/1/131164474/murigixuve-vugekupoli-ganupirimawowi-bamepokug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://josekew.epizy.com/ruguma.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/converting_customary_units_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/44759207241.pdfIn PDF document text
    • http://jariluwalube.epizy.com/argos_case_study.pdfIn PDF document text
    • http://tikolikenugim.epizy.com/kowekodefanubad.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_off0000e3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B0 6412 bytes
SHA-256: 0cf417c8674e2473bb453df45dc64e851bce92fdb1d68f4e54b5ee3ccec54354
font_01_sfnt_off0000f9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A3 4852 bytes
SHA-256: ef11621cd46f492bc27753cb54836b0f60dca52b90f8db0302963ef33fe138c2
font_02_sfnt_off00010a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0D 3416 bytes
SHA-256: d47e31cf1c22c6cd3c8197d98a5bb496fd46a029a13896ed4d2c8e6d37417468
font_03_sfnt_off00011692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11692 10920 bytes
SHA-256: 16632859b32c2a6ae9a07ac463c41ee3a91c7d222f971ba46fc0f04b96a17776
font_04_sfnt_off00013c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1F 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550