Malicious PDF — malware analysis report

Static analysis result for SHA-256 0375dd0c5e8b67e4…

MALICIOUS

PDF

78.1 KB Created: 2021-06-06 21:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f4a665191beacc8dc4831b9e688367c2 SHA-1: 69ffe704891f1dfa4123323376629c4cfb4fc06f SHA-256: 0375dd0c5e8b67e4b1ccabdb73fc07d4877ffed41588850e8328eaa7e6aaa097
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs point towards techniques like Spearphishing Attachment (T1566.001) and potentially Command and Scripting Interpreter: JavaScript (T1059.007) if active content was present but not detailed.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://huntic.ru/pbw?utm_term=how+to+make+a+cheap+router+lift+mechanism PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421966/normal_6040bab6673c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418575/normal_5fe90f6b7fab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_6039549e1df3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_60589370dc257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487905/normal_6042d76e603ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465705/normal_606c43757d0f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_601a7e70ad960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409602/normal_601ff13d98275.pdfIn PDF document text
    • https://bovabesizepin.weebly.com/uploads/1/3/1/3/131383515/7f6749a5dd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391013/normal_6060df89538de.pdfIn PDF document text
    • https://lasasokuvob.weebly.com/uploads/1/3/1/6/131607269/6197674.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/17532637-0b9e-4ee1-a81f-93e947059cf4/ielts_upgrade_8_practice_tests_listening_test_1.pdfIn PDF document text
    • http://sozakuvepar.pbworks.com/f/fufubelupokoworijulemuv.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/w/file/fetch/144524268/jifuvalutasalonalukupafud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c54c95-ebd7-41ff-9ed6-1a7168ee3c04/fenelevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/539407e8-5d45-4def-9787-02693646de5c/what_power_would_i_have_in_the_darkest_minds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa787ba-268e-4128-80ed-c17efbc046f4/77699320876.pdfIn PDF document text
    • http://podixarutib.pbworks.com/f/sufelipilusovadobusawopuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3887ff-452f-420f-b967-620993d096d6/which_of_the_following_is_not_a_true_statement_about_variable_costs.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_off0000f43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43B 5372 bytes
SHA-256: a20f16400be42e5cb92ec2866b24ec0c7d4f87442f52f5b3ae47f021d2b42489
font_01_sfnt_off00010666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10666 10892 bytes
SHA-256: 1d40b88d106ffce17cd9d79cf916227ee60b5cbea91082640bbc06d4d0eaa9e4

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