Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e622eb849cfe743…

MALICIOUS

PDF

72.8 KB Created: 2021-06-05 00:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 38046f3b6cb8b70aedea3d00d2f23ddd SHA-1: dea80685b3f07b6b3d85553381f313aba7662769 SHA-256: 6e622eb849cfe7430443795ac4e221f6fad871557d23ee414d3153f651cd806f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 6

  • 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.
  • 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://queure.ru/pbw?utm_term=how+to+work+cobra+cb+radio PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417226/normal_5fe2378d49a50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499653/normal_5fca6880db483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451353/normal_605ef24a6f1e4.pdfIn PDF document text
    • https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/sorego-sisifebopok-xazoperaperiwuf.pdfIn PDF document text
    • https://zidereromozuj.weebly.com/uploads/1/3/4/6/134602294/timidunotamovadoxo.pdfIn PDF document text
    • https://nezokamovijemi.weebly.com/uploads/1/3/1/8/131856769/3097064.pdfIn PDF document text
    • https://purigimotefejis.weebly.com/uploads/1/3/4/3/134308192/ccaca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476270/normal_602f2e7c44d15.pdfIn PDF document text
    • https://zugogulubituwo.weebly.com/uploads/1/3/4/2/134266111/2827420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417815/normal_6044d4633718a.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/d34f5cfc-ae2d-496c-a9e8-9ed638f58fde/exercice_maths_5eme_calcul_littral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa8f92a0-0ceb-4d75-afa5-72547bf4d9f5/what_are_the_11_laws_of_maat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2831f144-f6c7-4c4d-ac54-453231ce5cd6/82691464503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98153c75-0b9b-4821-82bb-15fe356b7967/who_is_victor_in_miss_peregrine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/403b4134-4d51-4db4-b66c-98317a469876/28312238333.pdfIn PDF document text
    • http://ruwomodanom.pbworks.com/f/18180040618.pdfIn PDF document text
    • http://pusavivo.pbworks.com/w/file/fetch/144477249/56972752807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75a2f86d-07bb-4538-ab6c-b0ce1c44913b/what_is_spiritual_blindness_got_questions.pdfIn PDF document text
    • http://jabodawo.pbworks.com/f/marakuvogaw.pdfIn PDF document text
    • http://jolunatimavu.pbworks.com/f/xibudefanozu.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_off0000e0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B0 4980 bytes
SHA-256: 4316cdb9c2213e9f17eb68297bf166b277c74e3a80858fcd456c28f854fa9267
font_01_sfnt_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 10696 bytes
SHA-256: a9ea0dd0c4dab4260f09ab6a935ea8318ac509a0e903ed7aca88e4ae64577e67

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