Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc48372578b92165…

MALICIOUS

PDF

69.5 KB Created: 2021-03-08 23:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 04f8d39456aa10891c091a75d7223c75 SHA-1: a90c975b1df4a4d133645fcf4646ebbbcfaa8f6e SHA-256: bc48372578b921655f9c3f68d53a6975dd63fe609efd6a5a07148b71c0a225cf
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.8294

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://seumenha.ru/award?keyword=libertango+accordion+sheet+music+pdf PDF link annotation
    • https://pekixozere.weebly.com/uploads/1/3/5/3/135397988/3481738.pdfIn PDF document text
    • http://dikebar.22web.org/lexirilexinajisaw.pdfIn PDF document text
    • https://rajopolaxobi.weebly.com/uploads/1/3/1/4/131406270/9394007.pdfIn PDF document text
    • https://xukanodipu.weebly.com/uploads/1/3/4/8/134885825/6cf5d389d59a.pdfIn PDF document text
    • https://fadasizoguwo.weebly.com/uploads/1/3/6/0/136050507/7953245.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_31488ded9d514a0981c8cdde028534ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/ihome_full_size_wireless_keyboard_manual.pdfIn PDF document text
    • http://pobikifi.rf.gd/31082214695.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/rubujonematoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbb981f-53c0-4542-a311-1db4d7e0a185/daxovinetofatenamuzopupif.pdfIn PDF document text
    • http://filutapokupa.epizy.com/2798367884.pdfIn PDF document text
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_6efd53db82b24dc4b2683c0ea2f99f2d.pdf?index=trueIn PDF document text
    • http://noderisaxe.rf.gd/moxegire.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_00e9297660d54bd5be2ca7b0b594f4d6.pdf?index=trueIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_0ecf80a2d08a4f9e8c5a73096a4e8b1a.pdf?index=trueIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_40ba41911a604865b4172340c16d1c3e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78ff478-a69e-475d-9f58-dcbd611f4db2/diary_of_a_wimpy_kid_movie_netflix_canada.pdfIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_8fb0d006c7f74c759358483f278206be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/how_much_does_it_cost_to_make_a_basketball_court_in_india.pdfIn PDF document text
    • https://efed9c07-4553-4484-a419-1b844d271aeb.filesusr.com/ugd/6f475a_b885651389f94aabb6a155bfdaeb30f1.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE406 5500 bytes
SHA-256: 9da65f570f99aafaa6c527038b3d839ef0e7b36eb2d6ce15eb991f6d0ba2a68a

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