Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebc5e9d1589765f…

MALICIOUS

PDF

66.1 KB Created: 2020-11-23 20:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c61a542a33b7707d8f81eb05fa005f74 SHA-1: db52bdccc9c3675692a78c9133784ce210d00d75 SHA-256: bebc5e9d1589765f93a31883b9bf9b319e30921235a725edd05c9c1abc1438dd
156 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 0.9997

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 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.
  • 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/strik?utm_term=survivor+season+38+episode+7 PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.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/metakibeme/allegiant_dual_audio_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/70461791638.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/linear_bearing_design_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f547915a-b496-4041-8647-3795d8f3e303/lagovaxamirudufida.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/movimazen.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/the_c._e._l._l._story_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/wufov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/664e14cd-2e50-46b3-8968-aca5b0b55ccc/40925421620.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/los_12_acuerdos_de_paz_en_guatemala.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/counter_strike_source_steam_free.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_off0000c709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC709 5520 bytes
SHA-256: cde8b53aca6206d204992a435ad147d2d12097850b306a8a1044badfbf549014
font_01_sfnt_off0000d9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E7 10048 bytes
SHA-256: 372b3592a9675ace978ac9fc5d8b12baf301f93cf40d8850d420e6f3d46a0c22