Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e20b19a469194c…

MALICIOUS

PDF

72.9 KB Created: 2021-01-04 01:02:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 165da0b2ad3930946f72bd060d1a44b3 SHA-1: c82431c2a663954396248d56d019d3f20be5675b SHA-256: 80e20b19a469194cbe64f45435fcefedabd99dff72b2ede9965ec642bde6e5a4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical PDF link farm detection and a ClamAV signature indicating it is a phishing trojan. The embedded URLs suggest an attempt to redirect the user to external sites, likely for malicious purposes. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent, possibly related to phishing or malware delivery.

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://trafffi.ru/aws?utm_term=nfl+teams+uniform+schedule+2019 PDF link annotation
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/nudikajarino_gobamisiwolu_doturadofikefu.pdfIn PDF document text
    • https://gebulofafilo.weebly.com/uploads/1/3/4/7/134717894/gaxede.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/xiraku-tokabido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_5fb6626d93561.pdfIn PDF document text
    • https://jewupoma.weebly.com/uploads/1/3/1/4/131437657/pedimeronubup_guside_gotapaxifad_pelev.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/ronenitevodo/all_logical_fallacies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b6d4bc-a14b-4832-bef7-1ef83c746516/63859623893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e79f4d2c-8ea5-40e1-ae46-8229b3eb795e/7849856731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5c7aaff-c4d6-44b0-ac46-8717f19eb218/84027013592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5b80a0d-1a5c-4d93-9bd5-2db271aa19b5/nezoluvem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59ab733-4e33-4932-ba15-154bac1248ff/sabukewopizuliwijaf.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_off0000de5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5B 5712 bytes
SHA-256: 96b58db0523b63ab76cdf43513bc4244423d339b16b152cc2b10b32f7670eb53
font_01_sfnt_off0000f1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AA 11004 bytes
SHA-256: 649de41f6c422832bf78de46de62cd3dda2b2bfc1e63d4feabf55bf3367c7b38

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