Malicious PDF — malware analysis report

Static analysis result for SHA-256 91300f6f07a8aee0…

MALICIOUS

PDF

74.1 KB Created: 2020-11-09 21:59:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 22663a80850a5dffb8ca62483f3b2fa9 SHA-1: bd621741482a4fb5aea51bd11d1680a5551a879b SHA-256: 91300f6f07a8aee0e2fcee6692b1f26008c1008ae7499cf26ecca47865190b3f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous external links, including one pointing to 'trafftec.ru', suggesting an attempt to redirect users to malicious or spam content. The document's structure and the presence of embedded URLs indicate it's designed to exploit search engine optimization techniques to distribute spam or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?keyword=shinmai+maou+no+testament+uncensored+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417049/normal_5f9ffe9867bdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374963/normal_5f893d63a7867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_5f9caae5b569b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f87eec07647f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5f99f80c9a8cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_5f9b4530efb83.pdfIn PDF document text
    • https://mabudorowux.weebly.com/uploads/1/3/4/4/134458492/mafizemivura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423429/normal_5f9ae0f4b35ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447263/normal_5fa41320c47ee.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/xesezedugupolanuvog.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/litunux/theology_of_biblical_counseling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/748fe4a8-d653-4b91-a16a-28cd3a11e10b/69074521640.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/zagosusakudamokapo.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/pathfinder_maps_of_ustalav.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/apk_editor_pro_free_fire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a65129a6-ea64-43d8-b7fb-ac9e1a66356d/sikejafuv.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/panelview_600_manual.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_off0000d137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD137 4980 bytes
SHA-256: cd459e4aed2dcfffbd3c210195190f12c714abdf0563f3d868bea1d05d797b2e
font_01_sfnt_off0000e281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE281 5416 bytes
SHA-256: bc835385af4d898cdaa2d5340bc6a796f3276ec77ab85daccf615f47b9ff4e31
font_02_sfnt_off0000f4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B6 10608 bytes
SHA-256: 616ecfc4e3e6132a443c7d6da0af137540b0ca83b9870406c912894ac20b7bb3

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