Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b142a7a62113d86…

MALICIOUS

PDF

66.5 KB Created: 2020-12-25 11:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e8fa772e3458a20c1eea3e86738a3ff4 SHA-1: 52f4633ed730542e631bda5ebc467d278a931611 SHA-256: 7b142a7a62113d867e44aead0449f8d64a4815b75444ef4ed07fe68c8d13d298
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

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 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://traffnew.ru/strik?utm_term=logo+maker+for+business+logo+designer+logo+artist PDF link annotation
    • https://fenatelelopowi.weebly.com/uploads/1/3/4/5/134510159/c4186a7bb8a731a.pdfIn PDF document text
    • https://wepoduxusuduxi.weebly.com/uploads/1/3/4/3/134306179/e21088cf5149baf.pdfIn PDF document text
    • https://rasisepuwefu.weebly.com/uploads/1/3/4/6/134678142/vopepatibirufa-mivila-timawavaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f89e08a331db.pdfIn PDF document text
    • https://nonokutofukidob.weebly.com/uploads/1/3/4/8/134872148/4907254.pdfIn PDF document text
    • https://kebuwusatame.weebly.com/uploads/1/3/5/3/135343151/jabekab_safuxotogesob_kujen_xipotenotesa.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/wopari/pathfinder_brawler_archetypes_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/beximulebafanudomem.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/chain_of_command_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228d8093-dd0e-4a21-9f10-8c0570b86f0c/gizuranonavivudina.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/business_plan_for_a_startup_business_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/carotid_artery_stenosis_guidelines_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/lateral_view_of_the_brain_inside.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/cypress_creek_hoa_grant_fl.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/lip_sync_battle_guidelines.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_off0000c7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F0 5372 bytes
SHA-256: ab25df79e6f84ff429f5c7255865d87debd62e7e86f2fef470d7f328f62de6bc
font_01_sfnt_off0000da20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA20 10160 bytes
SHA-256: 991759b5f6675edcf78c1092a7f1b299ea73f0b2f591cd600623a46027c628df

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