Malicious PDF — malware analysis report

Static analysis result for SHA-256 41265d2c7a55002f…

MALICIOUS

PDF

75.1 KB Created: 2021-02-24 23:12:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 59196d655100b82a406a06e479db415e SHA-1: 28541078bbb5937f38fa76e595c84adf348b2efd SHA-256: 41265d2c7a55002f5436415453024ecd983bcdb2ef8d231bc000daf6336948da
96 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. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/123?utm_term=do+water+fleas+eat+frogs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460466/normal_5fe42ab545df9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403131/normal_5ff2afcc54a6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393483/normal_5fc8b43a46b54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368486/normal_5feeb11a02572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457330/normal_600d5d2be6b5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483345/normal_6032c26c9c17a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5fe80210dce00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470678/normal_5ff92ba175cbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5fe7532992dc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443608/normal_600e134821aee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408190/normal_5fe804b09be3d.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/wisuw/92293612936.pdfIn PDF document text
    • http://girofili.myartsonline.com/is_nikon_d3400_full_frame.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/dolatifizutaseze.pdfIn PDF document text
    • http://duvodix.myartsonline.com/how_to_charge_timex_solar_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/ansi_c_by_balaguruswamy.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/15394438987.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_off0000eb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB34 5024 bytes
SHA-256: 83dac8dcb5c7e275ab15e4ff821e1f77d7ee3320b1e75a222907c3c926ab61d7
font_01_sfnt_off0000fc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC73 10280 bytes
SHA-256: 52d0eb8ae24e8e22a579d7d3de2ad74e56ea6cc9a2ee3386330235dac263d68b

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