Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a63e9b7ab10fd62…

MALICIOUS

PDF

69.3 KB Created: 2020-12-18 14:14:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7ed68fbe8fbe85ed0840100f568f77ee SHA-1: edfa144298308bf69444f28ab1cc1d8ddd5e5415 SHA-256: 7a63e9b7ab10fd62c51173b856989253465911d14d3cf8959ccde160543aa252
176 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, including PDF_SEO_LINK_FARM and PDF_URI firings, pointing to external URLs. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely using a lure related to financial documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/aws?utm_term=accountant%2527+s+certificate+of+confirmation+format PDF link annotation
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/lomixisukusozu-nelivefep-supiloxururad-jepevegusev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500668/normal_5fb72a1e45c24.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/rokiredezumafuj_gesigixajaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379618/normal_5fce623d713e1.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/a5456150-a235-4fa0-8fb5-dc16409e9a7d/lipakumokiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a44ebec-7d4b-4069-bbfe-d2654dd27c9b/5938887082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33bda689-769f-4636-a581-23172f5a6fef/bisopijitipuwelit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ce44df9-03f9-438a-8abb-31697d0dc6fe/54458835286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb61c4a1-7041-45f5-8b8c-73872499df98/97947503349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1883764-ddb0-4d52-b15d-e5ea3998f671/clash_of_clans_update_for_kindle_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b6f1c25-17a3-4bec-9ca8-2d4c566f0394/volsmart_android_5.1_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/30538237122.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_off0000d18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18F 5016 bytes
SHA-256: 8659ce76e48e0c76a9dc060dca41baf64cea642dea73602b5bc1b07fda3aac57
font_01_sfnt_off0000e293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE293 11020 bytes
SHA-256: 0fd2719047527256f9dbf0bb325ae54f7ef97cf2327a5550032d3ca5a04e5025

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