Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc846fb3e19dc35c…

MALICIOUS

PDF

86.9 KB Created: 2021-05-30 18:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7961e934eb613891f991bd6c84946278 SHA-1: a9fc16649ac1985c57b7a2b1710f0090f0dd2f8d SHA-256: fc846fb3e19dc35c24fc47fd90ecf2e3ba6dccb92d0078f73cc6c2ad65b5098f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a domain associated with malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest an attempt to create a link farm or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=suicide+squad+google+docs+movie
    • https://lapenemelibi.weebly.com/uploads/1/3/4/7/134708636/sazixorigisuwi_fuwizajo.pdf
    • https://dudererojafa.weebly.com/uploads/1/3/4/3/134362298/suxajideg.pdf
    • https://cdn-cms.f-static.net/uploads/4499660/normal_6064c41eb8a6b.pdf
    • https://static.s123-cdn-static.com/uploads/4464068/normal_6006b1faacf34.pdf
    • https://static.s123-cdn-static.com/uploads/4412607/normal_5fddce7d8280f.pdf
    • https://kezesefafuzer.weebly.com/uploads/1/3/7/5/137518356/c4e6e2a88309a.pdf
    • https://cdn-cms.f-static.net/uploads/4392667/normal_5fd785af4e64d.pdf
    • https://cdn-cms.f-static.net/uploads/4378160/normal_604e69ee43258.pdf
    • https://cdn-cms.f-static.net/uploads/4503767/normal_6047f1bf213f7.pdf
    • https://xasibegofijuga.weebly.com/uploads/1/3/4/7/134731363/9bb2bc3679b735.pdf
    • https://vavapeta.weebly.com/uploads/1/3/4/8/134848771/mutaxupigo.pdf
    • https://jipaxebuperiw.weebly.com/uploads/1/3/4/7/134751602/5886515.pdf
    • https://neburaguvud.weebly.com/uploads/1/3/4/4/134477844/7c788fcab09072.pdf
    • https://cdn-cms.f-static.net/uploads/4421336/normal_601b31bdcf44d.pdf
    • https://nisolelajuzo.weebly.com/uploads/1/3/5/3/135319935/7039326.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e512f7e3-3857-4f7b-a24e-85f1207483ed/finders_keepers_consignment_bardstown_kentucky.pdf
    • https://uploads.strikinglycdn.com/files/efb3040d-0eac-4165-b620-68951b7eba0b/epson_scan_not_working_windows_8.pdf
    • https://uploads.strikinglycdn.com/files/3e06373f-2d92-4e0d-ac2c-528e83c0efec/12727606161.pdf
    • https://uploads.strikinglycdn.com/files/0001d338-f9df-4a85-aa4f-1fa2d9120e10/what_is_tcp_ip_stack.pdf
    • https://uploads.strikinglycdn.com/files/5b0ff2b4-18b0-4d45-ae1a-c1dd99d22420/mixedababomadazonemu.pdf
    • https://uploads.strikinglycdn.com/files/e591908d-a6a2-47da-942a-f8fbc9e01d4b/gejixaduxago.pdf
    • https://uploads.strikinglycdn.com/files/8120a484-ce20-4724-933c-7e9c6bbd195a/79351604890.pdf
    • https://uploads.strikinglycdn.com/files/09899b20-d4df-492d-a7b0-e987ddb601aa/92965478108.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eea3.bin
cd0d6f01a5fce0e50d5caa4b79cd966ff159684907cf0829a9424076b7ef1799		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 5452 bytes
font_01_sfnt_off00010118.bin
50ca125b0d257618552ed7dbde28693f79a27622ef902a95d7f43f51e5adca70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10118 2240 bytes
font_02_sfnt_off00010b32.bin
ff5dfa301fe0797b9f52acaaab07cabf18efa4f15cb78ab9c45e05827ab98f0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B32 11864 bytes
font_03_sfnt_off000132df.bin
daf0a8b28b9f59a3efe5ad620dfa2d9ae8663d1f2c5f947ea30d896660790285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132DF 17032 bytes

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