Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48e305b0dbdd2a6…

MALICIOUS

PDF

69.7 KB Created: 2020-12-05 20:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 98999a2a20a10f890c6495da83c8d8dd SHA-1: 974ee76065923c0b799a63d2c47de710995b1a18 SHA-256: f48e305b0dbdd2a64a000a2aa7f9edd36ba1bf5dc11da6f027714cfb39229db4
216 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. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://sozatoma.weebly.com/uploads/1/3/4/4/134484551/b826de873c8.pdf.
  • 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/strik?utm_term=long+beach+gas+leak PDF link annotation
    • https://sozatoma.weebly.com/uploads/1/3/4/4/134484551/b826de873c8.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/996a3751.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://static1.squarespace.com/static/5fc0d900d26ff1194f736c6f/t/5fc3619a9b1ed03538483c87/1606640030793/wepunufirusevefa.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/editing_to_word_document.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/jegusuwanekepevurij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4379a56b-0834-4c61-ba31-db06d1082bd5/92745564955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8461d8c-10bc-443b-8df8-8fd0edc3d5fa/61695368447.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe09976457125654013d58/1606289816212/511_seal_and_enhance_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8121875-716d-467e-97e4-cdc47eed4e09/lovij.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1162b68612547ed5f39f0/t/5fc147423485235c86f5eeda/1606502210498/vobuxigapixapejip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc385f1c89e1c4b8fcf14f7/t/5fc9c9d4acaba317345f22e6/1607059929855/lekezesilimadejefewaworil.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/gradebook_spreadsheet_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc366d6ab79f442f239893b/t/5fcac1deb7f7163c76c6d27d/1607123422882/xawejige.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe077cbc819f1cf49f8a54/1606289277042/sterling_cutlass_short_scale_review.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_off0000c88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88C 4772 bytes
SHA-256: 1b228bff66ca9a3cedceab00d17d0c76b9218451781dcc24c712ff67b02a98fd
font_01_sfnt_off0000d8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B9 10640 bytes
SHA-256: 2cd076fcb17aa68b7043b6df83e4ef213cd3f60424a2824a709d8b6490d4f9b5
font_02_sfnt_off0000fc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC72 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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