Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c6e5fec984ba5c…

MALICIOUS

PDF

69.9 KB Created: 2021-01-26 06:29:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2024ba5698df0c4bcb8954670dc332eb SHA-1: 5719ac9b5cfef049734e1ff8fb1fb7e73b83cf9f SHA-256: b6c6e5fec984ba5c0f9d6f8ae3719566c9ca999dbe30f6f9c5dd595a57822f99
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to game walkthroughs, aiming to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/123?utm_term=poptropica+pelican+rock+island+walkthrough PDF link annotation
    • https://cdn.sqhk.co/bipukawu/ia7fLic/major_mayhem_2_hack_apk_free_download.pdfIn PDF document text
    • http://salet.store/crash_3_road_crash_time_trialrj5sh.pdfIn PDF document text
    • http://tiktoktop.design/zaguxivupi0nd9u.pdfIn PDF document text
    • http://frut-tree.site/wiwuxusotobigotogabokugozk76zu.pdfIn PDF document text
    • http://sarkife.site/10594707978zy57d.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/rJgiihi/49353357503.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/sasexalir_riluko.pdfIn PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/fowov_dalidosufitu_gezesovop.pdfIn PDF document text
    • http://bnatural.space/arzareth_yeezy_stock53f1z.pdfIn PDF document text
    • http://fastdonwload.space/avengers_endgame_legends_toyslizg5.pdfIn PDF document text
    • https://cdn.sqhk.co/savimatuv/cgcgcca/72295731146.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/jifedefujodu/gijoxiwesegotixolupavil.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/xibug.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/8962494212.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD574 5492 bytes
SHA-256: 0e42505c45e2254ab0967f4d62414ae5e7ec2c8059312003d6de9c9c022d2b64
font_01_sfnt_off0000e82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82A 9948 bytes
SHA-256: 9c31379680c7d18eafe9e36c54fbd906afc72ff24a99527f68bce3eb8f105486

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