Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae26b6d2f8415600…

MALICIOUS

PDF

71.5 KB Created: 2020-11-16 17:00:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bf3936b046efda9b3cbe07d2a4582019 SHA-1: d5dc7ed93a93b13f78163c2188372209652925b5 SHA-256: ae26b6d2f8415600c302826c5672e1e04f21d4f7acf16a5bb9c1fd8d38361683
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. The document body, though partially garbled, contains text related to a 'coupon' and 'buyers club', combined with heuristics indicating urgency and callback lures, suggesting a phishing or scam attempt. An external URI was also extracted, likely part of the lure to direct the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffnew.ru/aws?utm_term=sportsman%2527+s+guide+buyers+club+coupon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373526/normal_5f8d5d3b7be45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404299/normal_5f9fb3030d3a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379615/normal_5f984d5e87225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5f8a62eb6dc79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393183/normal_5fad652422418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383791/normal_5f998fe764713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f87461f9de24.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/b597c656-f478-4f7e-9b77-16e3bfd72466/pokev.pdfIn PDF document text
    • https://s3.amazonaws.com/rotafasaniz/charter_schools_biden.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/academic_articles_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35707b3b-72da-4851-8be2-fb31f05a570b/75630432161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24411646-be82-4ba3-a3a6-f2af1d404870/24638458611.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_off0000d753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD753 5772 bytes
SHA-256: 375ca031389d69b07e939344724db3831b2c8bd857c25392e225cf542d9f322b
font_01_sfnt_off0000eae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE5 11316 bytes
SHA-256: 1f59602346d09dc3607c6b018f8cfa182261c56cb98fac8d92e480207c7ab5e9

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