Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aad11dbb3345486…

MALICIOUS

PDF

90.3 KB Created: 2020-11-10 07:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8102651e3ab8e30c1e98e724540e3d4e SHA-1: dba3db41cd808e0b7334639fd892de194ea89c83 SHA-256: 2aad11dbb3345486dc6368a399a8e53e64baf0534792ed3c1ae3f970aa0ca3a0
176 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 a callback-phone (TOAD) lure. 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 0.9995

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.
  • 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.
  • 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://trafficel.ru/123?keyword=schedule+a+fedex+pickup+phone PDF link annotation
    • https://nutolifawivu.weebly.com/uploads/1/3/1/4/131437776/maturumirubevevariji.pdfIn PDF document text
    • https://boxolajabamofi.weebly.com/uploads/1/3/4/3/134356625/8575388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8e422e4f7c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f91347351463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425005/normal_5f9adca550366.pdfIn PDF document text
    • https://vubumemor.weebly.com/uploads/1/3/4/0/134012760/mitate.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://uploads.strikinglycdn.com/files/70458b24-1810-4260-bcc6-550541a85628/gunazusugababaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d748a1-72df-4611-85b0-8e8fdfc5e1c0/81431591555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ce97d0-fb4a-4962-8d77-dd0e4035e3c2/pathfinder_flip_mat_classics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d3f971-11cf-46ec-90f9-1523f55363d6/tejuzutigakuderemi.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_off00011666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11666 5004 bytes
SHA-256: f71f74a13cd735b38f4096804e6d895c3f32af0ae5a7caba548471fdef3cdd42
font_01_sfnt_off00012760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12760 11436 bytes
SHA-256: 4a3682150e4379514ef79a8ee41043ea3cc194d907360ccc09e20ef60784521c
font_02_sfnt_off00014e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E82 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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