Malicious PDF — malware analysis report

Static analysis result for SHA-256 e092a7cabd6cecb2…

MALICIOUS

PDF

70.2 KB Created: 2020-11-21 03:30:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e7a855ac17e7f4371deb3bcb8721aec0 SHA-1: 10bc4554b09fe420231b7b42c369a050fbf70c92 SHA-256: e092a7cabd6cecb22a265d5f4da73d87238e760982e6e2115a8ecf088ca808d4
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 0.9998

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
  • 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://cctraff.ru/123?utm_term=enzyme+cut+out+activity+answer+key+part+a In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5f95cd1e4e400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_5faa4b3ee46a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5f88f91a4b9fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420939/normal_5f987583b4a34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_5fa11e469ebf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_5f935e6157f88.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/kapof-xiladaxexikif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410418/normal_5f963beace27b.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/680ba407-de41-40a0-892e-b798fe4d19eb/75865044399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f40b1950-2a06-48d8-93e7-26892fe15f31/zejotukutimitida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a34659e-93b8-492c-84ce-a517045d7ab2/95760682955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaab086b-6c21-4bca-a738-dfad750bd4bf/48016890150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2beae55e-2075-4dfd-ad45-5bca24efde0d/skyrim_expert_spells.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe2df58-2ad7-461a-8c25-e1798c70052f/renisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6496211f-1a31-4a5c-aa92-680f81a9ba8b/fekutalotosuzusuga.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_off0000b580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB580 5256 bytes
SHA-256: bcdb2b9d53cf46ebaaa197f83e4e815f98c152c71e18d913516acdd30d9a96bc
font_01_sfnt_off0000c766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC766 16936 bytes
SHA-256: 19f8a31a15281f6263fea08afdf8b1e470152da2003f5e58d0e51d4207545ca7
font_02_sfnt_off0000fb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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