Malicious PDF — malware analysis report

Static analysis result for SHA-256 a210366695a81b1d…

MALICIOUS

PDF

116.1 KB Created: 2021-03-14 10:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a7654516d3efba951f09f85f73bfa3d8 SHA-1: d2e8370d466967c17c37104fe64fc9928c7ca0b9 SHA-256: a210366695a81b1d3db22de59453fbd098f80e1cf4fdc8e8e48d4aba8e06269c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or SEO poisoning attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest a phishing or malware distribution vector.

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://soxebez.ru/wix?keyword=baby+trend+flex+loc+32+manual PDF link annotation
    • https://cdn.sqhk.co/xojelumegasi/gpdFghW/didi_friends_tayar_bas_lirik.pdfIn PDF document text
    • https://cdn.sqhk.co/xogeloke/heBja6i/81801460777.pdfIn PDF document text
    • http://plsale.pro/37432032795e28ha.pdfIn PDF document text
    • http://converstarget.ru/nudokoletoguwinijuteb4ar3q.pdfIn PDF document text
    • https://cdn.sqhk.co/ronelejibir/iixUgg2/3247559534.pdfIn PDF document text
    • https://xonuguzuv.weebly.com/uploads/1/3/1/3/131382030/xiranuveladir.pdfIn PDF document text
    • http://harmony-market.ru/what_eastern_philosophyjkx24.pdfIn PDF document text
    • https://cdn.sqhk.co/porodiwaten/d0ghibQ/ralidesiparumijiropafaso.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamujigip/xigyijq/xevudewulurazapujafe.pdfIn PDF document text
    • https://melitonewivowaw.weebly.com/uploads/1/3/1/3/131380875/6610670.pdfIn PDF document text
    • http://helplnstagramoffice.com/baby_boss_2_full_movie_freekirdh.pdfIn PDF document text
    • https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/6230000.pdfIn PDF document text
    • https://lobogisotu.weebly.com/uploads/1/3/4/8/134870795/mabumuxozil.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/U4gjAZw/portal_quest_fantasy_examples.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/kozibowisenatu/roku_streaming_stick_plus_headphone_edition_target.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/blount_disease_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/50297038215.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/68760789500.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/wulojuzomozuvin.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/letter_k_tracing_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/asus_z97_cpu_support_list.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_off00018aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AA7 5644 bytes
SHA-256: 2f09965ac45ba7950aed98957ce11e7f1143a347c520e5963d97d224e29db767
font_01_sfnt_off00019dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DD4 10880 bytes
SHA-256: ad85af948186d543700601142cb3031db419204d69d02873da885db84faebba0

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