Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b89ec53b0835c89…

MALICIOUS

PDF

65.0 KB Created: 2020-12-16 04:11:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f14e9de660c358b2c22589d01aeac132 SHA-1: 90c04b09eaf0e0f07c61a76ae8440e5f80d5c546 SHA-256: 1b89ec53b0835c8939d41ac22e9dc25c20062fe75ba5a2a963d982782fe21e04
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=mandated+reporter+maine+training PDF link annotation
    • https://pebepatesova.weebly.com/uploads/1/3/4/4/134447190/lumixulabobobi-raruped-vazob-xinuputivor.pdfIn PDF document text
    • https://zemezomar.weebly.com/uploads/1/3/4/7/134711889/tokumisezob.pdfIn PDF document text
    • https://zurowesijeja.weebly.com/uploads/1/3/4/6/134630916/bexotoditaxumugi.pdfIn PDF document text
    • https://foruvojupizife.weebly.com/uploads/1/3/4/3/134352799/8a702c3062f7520.pdfIn PDF document text
    • https://vuwapelenepaje.weebly.com/uploads/1/3/4/7/134705438/gokogotife-zarogo.pdfIn PDF document text
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/kipiwaregogibepig.pdfIn PDF document text
    • https://nisutezobeta.weebly.com/uploads/1/3/4/4/134486685/7411183.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/182410bb-6094-4aca-9168-1833eb45657e/kasategutebetetof.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/transformers_black_mamba_starscream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86d4071c-2207-4e69-84cd-251a04e909ca/fevikabijakadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff7db06-f9ab-4c61-a28f-4e6ac5b307dc/68303008185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e444b500-c7c1-426f-a0f4-c09609730b59/lobesobozajilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd38527b-e3ca-479f-902c-9714f6f1fba6/28651323892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee74442-40f2-495d-bd35-b8cd8386e782/delubatezibofevijakelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba26dc95-1cdc-42c7-998f-c05e5934b818/66653129202.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A4 5076 bytes
SHA-256: 9dfc693dcd8b9f06e3707918c3acf996c3e3c2522e0238cea73c8d578cdcdb42
font_01_sfnt_off0000d3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DB 10504 bytes
SHA-256: 058af103df5599ee4126f125662d11e71630bec63069cc5b193e11df83a01c16

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