Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf0853f33d75c25…

MALICIOUS

PDF

80.4 KB Created: 2021-03-03 17:39:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f6a095f57d43c8d7984e668acb9d1efe SHA-1: 928d7592f62f02638ebecda7d2f4b7143255ee56 SHA-256: eaf0853f33d75c25515da29e338e604440fe577f7775f2923029a4dd53c8d1ac
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/award?keyword=how+to+apply+hair+dye+without+a+brush PDF link annotation
    • https://cdn.sqhk.co/kimejijomaki/fNjeGS4/playstation_network_sign_in.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417029/normal_602e2dc76f026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416787/normal_6035c0f3e9a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5fd1aadd17af4.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/Xifxjb3/65125382767.pdfIn PDF document text
    • https://cdn.sqhk.co/feduminaro/euf2Yii/final_fantasy_vii_remake.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/how_do_you_fix_a_black_screen_on_a_hitachi_tv.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/falafeg.pdfIn PDF document text
    • https://xidokuwu.weebly.com/uploads/1/3/1/4/131453793/wasigogupiba_nubajuga.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/ghagiPp/21005905522.pdfIn PDF document text
    • https://giwulotasika.weebly.com/uploads/1/3/1/4/131411199/vonij.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/15197005085.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379722/normal_5ff56dfac593b.pdfIn PDF document text
    • https://tesetugunujogub.weebly.com/uploads/1/3/4/0/134040467/mewikibezojim.pdfIn PDF document text
    • https://tulopudegiwidal.weebly.com/uploads/1/3/0/7/130739196/xesezus_dupum_denox_jebuvereleki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tumasun/bunif.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/septic_shock_treatment_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/visual_studio_2015_professional_we_could_not_download_a_license.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/endnote_free_trial_version.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/nisoj.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/24817910925.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16F 5120 bytes
SHA-256: 0cb25917e86a43d48e5cd0c56d9464afbab7acb1d51281a30ebb394061cf5729
font_01_sfnt_off000102f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F1 10136 bytes
SHA-256: 65f3db2c245188bce0093ed1eece17eb06174878911bc575c2fe5b4c7621b452
font_02_sfnt_off000125ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125AD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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