Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6f27acbe22ddcf…

MALICIOUS

PDF

69.4 KB Created: 2020-12-17 06:39:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 89e484964c64109f271a0cbcb543ae6e SHA-1: e76c0e7727085f2bb75a326426fc15ffd5844eb7 SHA-256: cc6f27acbe22ddcf4b9514493498d77c7e3fc0d9abdf21767463a8a25b47aaca
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that appears to be part of a link farm, suggesting a phishing or malware distribution scheme. The document body, though partially corrupted, contains text related to installation instructions, which serves as a lure to encourage users to click the malicious link.

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://traffnew.ru/123?utm_term=t1-11+siding+installation+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403954/normal_5fb5def7006c6.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/8530269.pdfIn PDF document text
    • https://gumomamomav.weebly.com/uploads/1/3/1/3/131398069/ea9082833e000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401972/normal_5fb2abd6d03cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5331d17e72026400627cf/t/5fc8e0437ff5a343eb000ed6/1607000131732/arabic_fonts_for_instagram_copy_and_paste.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f485cd1e280355d49316/t/5fc83ca0094cf7617db9a5c0/1606958241651/fisavudofuremufu.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/sejevonezawidirosafalus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0062edabee7b4407df07/1606221922839/imac_a1224_disassembly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109ab14f-1dd5-41a0-890a-e59f2952638b/suwolobugetojim.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunoje/5723007356.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc791041a9b7f6479384afc/t/5fd05a9fa9460057587c07c0/1607490208105/zevokusogageruvu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66b26c30a162e0c7861d2/t/5fc6b0d6bc819f1cf4c589b5/1606856918886/kifojedemugogavi.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_off0000d4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A5 5140 bytes
SHA-256: 1c16eb7f0b67e60822d240d5afbd28cff1e74beb62ba41e6d8258f6b1a7a2ffc
font_01_sfnt_off0000e63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 9992 bytes
SHA-256: ab757e3ab1d5730421d9cf6935dbf80b8fd483f03c59d9c80299a49aecbeacc6

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