Malicious PDF — malware analysis report

Static analysis result for SHA-256 60aead5da0951244…

MALICIOUS

PDF

52.3 KB Created: 2020-11-19 06:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e792e8affe13babbc03b34adfb54b6ce SHA-1: 2d7cafc771c14b5737aa47d5b6655875108e8a7b SHA-256: 60aead5da095124420918d12f2d19ba71e71b373ced704d7dad420e8b0855da1
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including a redirector link and a link farm. The ML classifier also indicated a high probability of maliciousness. The embedded links likely lead to phishing sites or malware downloads, consistent with a spearphishing attachment attack. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8156

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/aws?utm_term=fighter+plane+sound+effects+free In PDF document text
    • https://xozagalan.weebly.com/uploads/1/3/4/5/134519104/79af9817faa6982.pdfIn PDF document text
    • https://povelelowu.weebly.com/uploads/1/3/4/3/134331265/2580068.pdfIn PDF document text
    • https://weritudasokapo.weebly.com/uploads/1/3/4/4/134494226/pudunurikaxisodameb.pdfIn PDF document text
    • https://xibulifi.weebly.com/uploads/1/3/4/5/134509251/3479489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470532/normal_5fa3952f747ca.pdfIn PDF document text
    • https://pumewigegokofav.weebly.com/uploads/1/3/4/3/134317234/jinagezagiwomi.pdfIn PDF document text
    • https://mutosonagok.weebly.com/uploads/1/3/4/3/134316738/7611786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5fafff806adcf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2b92048-08b1-408c-82a6-b45cac04a73a/suxufavavojawebupin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2ffe330-2375-4f4b-8722-6176786f8475/49234318546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f04300-d625-4d86-a37a-14ebd4e4e58d/fumufujidetozonozuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e05b3a12-9c5b-4600-a01a-90b64df528fb/powerflex_755_manual_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37c67119-7e9b-43f1-b814-7f6db344d8d7/7315798050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba77c460-b15f-41cb-bf6a-81168ef5ae72/libro_de_fisica_general_schaum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b9134f-17a5-4ef1-8db2-9263ae86711f/adobe_indesign_cs6_magazine_templates_free.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7FF 5372 bytes
SHA-256: 27feb4e2002e605bd40ea7cb41e1731d044188095a1b14b14bd23fe70dbbe5d3