Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e562fffbf1bb4c…

MALICIOUS

PDF

69.4 KB Created: 2020-11-22 00:28:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a8e9783cb9f279398afc75859970fe68 SHA-1: d842b5f47e3b61bfb546bebcc55d891d38d0713d SHA-256: 62e562fffbf1bb4cbf406d23921dc9709dc7f3fcfb3848d0ebc2d332c8f9aca3
214 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=supernatural+castiel+kills+uriel In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_5fa9036015247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_5fb98e6d122ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480149/normal_5fa63b17bdfe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487927/normal_5fb76cfc8febd.pdfIn PDF document text
    • https://mogugadikawes.weebly.com/uploads/1/3/4/0/134096191/fumobuvodiwatem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5f8ab7834fbac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444095/normal_5fa50c649b2be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0fdfe8b8-8609-4346-8131-fbaec069b09a/wasuxixokelugusup.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/high_school_math_vocabulary.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/badminton_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76463b48-fda3-4392-a7ee-20ff6a8c1962/diminished_triad_on_guitar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC721 4864 bytes
SHA-256: 47c84ca26a19a20836a790ce7ed2460b894b1c79b46ae3a5e5898728a60ca6fc
font_01_sfnt_off0000d7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AF 10400 bytes
SHA-256: 860a2a698fb71cbcb2a5c5f7c68a501c4bc829af0a099271346dc59ab00dc99f
font_02_sfnt_off0000fb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB20 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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