Malicious PDF — malware analysis report

Static analysis result for SHA-256 e179e4c09d96c388…

MALICIOUS

PDF

73.4 KB Created: 2021-02-25 22:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0f547fa9f9f3c4fae21aa900d8d2349f SHA-1: 614852e779c1e13c782699040f09ee558962e490 SHA-256: e179e4c09d96c388f3a13658a0ce82d87c8468657a4ace511e18b0228b2ff06d
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL that appears to be part of a link farm designed to distribute other PDFs. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document is part of a larger scheme to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/123?utm_term=the+four+3+movie+in+hindi+download PDF link annotation
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/7a73d22e72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449004/normal_600f75f0a8da6.pdfIn PDF document text
    • https://cdn.sqhk.co/kagofiwavum/jt1gdjf/xopabekereg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_6031330c953f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368969/normal_5fe233827d0f7.pdfIn PDF document text
    • https://gumewixolasadaz.weebly.com/uploads/1/3/4/6/134659592/8652466.pdfIn PDF document text
    • https://cdn.sqhk.co/zipuzedozame/hi6pgc0/22500601001.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411501/normal_5fdfb356298a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5fe88159ba23e.pdfIn PDF document text
    • https://cdn.sqhk.co/jikowuzu/jbjaQhi/epic_card_game_meta_decks.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/nggKgct/ninja_foodi_air_fryer_oven_dimensions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_6010dd915d282.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/a0Qgchj/anycall_mobile_price_list.pdfIn PDF document text
    • https://cdn.sqhk.co/nimabugokofa/dlicgjh/mojupawegulovidi.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/5eF1hij/rozajasuxexamutove.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/rafiralexezol/gejejosu.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_off0000e2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A9 5236 bytes
SHA-256: 3ae3749c84f2769cd5149b33e291a7c2ac8fe360f502d59554d3859ea719df87
font_01_sfnt_off0000f466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF466 10560 bytes
SHA-256: 712a6b5b8ba1ec8276221356b6e558ad9a66782c319fd434abbae78debdc4a0e

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