Malicious PDF — malware analysis report

Static analysis result for SHA-256 380f6a157ee8cc9c…

MALICIOUS

PDF

68.7 KB Created: 2020-11-24 06:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bd3a3cd086660cb5bdfd359f3354b313 SHA-1: 24d0ce87325ab16595e067588a570796bc42035c SHA-256: 380f6a157ee8cc9ce349b036a36f0c1d7bf51d142b396217d03f10ee7d2125cc
164 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 and presents a deceptive download button. 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-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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/aws?utm_term=atresia+ani+in+calf+pdf PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/nikapilasitudidugi.pdfIn PDF document text
    • https://xumejiti.weebly.com/uploads/1/3/4/5/134529375/9415548.pdfIn PDF document text
    • https://jenafowumavadas.weebly.com/uploads/1/3/1/4/131437472/8465739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404524/normal_5fb71441b5682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f9ecdce97705.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/5df6056e9a3fa4.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/henghuili-files/solidworks_tutorial_12.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/whatsapp_uptodown_new_version.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/91148636686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d40e2f-f345-4ad0-b341-c1a6f40e5c26/24922255174.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/bernardo_bertolucci_1900.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/23407100437.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/31957406573.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/petaxekiriwekef.pdfIn PDF document text
    • https://s3.amazonaws.com/digigitusuduk/miliremi.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_off0000d032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD032 5140 bytes
SHA-256: 0f8293e997affd1b33915b4445a2253a03a0ec835071f5994151482cfb97071c
font_01_sfnt_off0000e1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 10504 bytes
SHA-256: 52db3f8fed65f41d3510319849c18762c3ccd747beafb9ee0d2996200a97c4ff

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