Malicious PDF — malware analysis report

Static analysis result for SHA-256 36acdfe6d22b8ef1…

MALICIOUS

PDF

58.0 KB Created: 2020-11-13 19:19:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7e5ad9a2aea829d65ea275360acce8c4 SHA-1: 16c91825368eabc79a645383ec2b7e262be8537e SHA-256: 36acdfe6d22b8ef1a10c2583f93a579b5cd71005ca9ac62f25603896c6446d15
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. 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 0.9996

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://gettraff.ru/123?utm_term=ccsd+support+staff+pay+scale+2020 In PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/c4fc82a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f87408680185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412767/normal_5fa830250f76a.pdfIn PDF document text
    • https://xapunuzut.weebly.com/uploads/1/3/4/6/134683745/kakiwagepipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mulerux/unr_math_department.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/pasadafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2501b5bb-5250-4aa9-925d-f176f8b4a31c/27809857406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c6d99d-f903-4d3b-9ae3-8ebff004f2f2/nopozipikon.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/1932_plymouth_coupe_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6912562a-4c9c-4f7f-89e0-6eb4578c5c38/jutosabim.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/fiximap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6bd08c4-81b4-4f26-a3bc-d23d77616701/lufugowepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aedd7a3f-267c-401a-a255-3b9194c9958a/5_de_septiembre_cienfuegos.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/wasgij_puzzles_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4189933c-b56d-4f4b-8fa9-78404c1a5e4c/bushnell_trophy_xlt_3-9x40mm.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/54445607821.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_off0000a97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA97F 5432 bytes
SHA-256: f31e698af62dd25224976f129e23b0790a629339e786f4335204812b8142db64
font_01_sfnt_off0000bc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0B 9180 bytes
SHA-256: 5d09638da4a327e88d4c91c972366f401b96ca2f47fa3fdb345c65e1dd69e4a3

Open this report in the interactive analyzer, or submit your own file for analysis.