Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb5baa4a1ebdbb6…

MALICIOUS

PDF

74.5 KB Created: 2021-03-12 20:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7bc437c3d437e148570edb9bcfc24d4f SHA-1: 5f46e568474cfec1dd9e9baabf71ff5255ba2bd1 SHA-256: bfb5baa4a1ebdbb698dc68a5075e5b60f8f008edaa9bd564dd3246f3a42acaf9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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
  • 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://fokemale.ru/strik?utm_term=tarzan+the+ape+man+1981+full+movie+free PDF link annotation
    • http://vigimakuzuzuri.iblogger.org/word_power_made_easy_by_norman_lewis.pdfIn PDF document text
    • http://kavupuv.iblogger.org/mudutemesejodo.pdfIn PDF document text
    • http://vugezaselefobop.iblogger.org/simple_snacks_recipes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_c54a8d83f2f14eaf9defc7492fa1bed0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xozeb/miwusupebiwatakam.pdfIn PDF document text
    • http://nasakitubaribud.rf.gd/the_poky_little_puppys_first_christmas.pdfIn PDF document text
    • https://8b7199fc-a029-4910-8138-caee300d1cbd.filesusr.com/ugd/da8f68_47d96ec2140c4864a9bcb677d3bfc71a.pdf?index=trueIn PDF document text
    • http://juruzozesema.epizy.com/vanimukedijiketivoxawale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25da9574-0099-484a-b043-ade5c123bfca/vuwexufezugunur.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_67d6f724fea14ce6926686ccd3a24db1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/56743778549.pdfIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_44c908c9a30d4319af5f0e2ea4b05f7e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef2f6169-4e55-4644-a2a7-71ae2ce5ac4b/kutedizowubopomovafom.pdfIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_416a6af5a01343bfa0625334b9841e4e.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_ecd34b61867d49f39fea5167b3a7e4fe.pdf?index=trueIn PDF document text
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_1ee01fcf0acc43a7aa100132cee9ab69.pdf?index=trueIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_15de280c923c47159fcb5fa3943dfd96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/najubu/adiabatic_demagnetization_of_paramagnetic_salts.pdfIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_364ac8e1b12049a68a23bcdc63b3ffb2.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD650 5304 bytes
SHA-256: b66eec1a55f591fd7a7c34f0f920686bf30a4188d1df772cb86f9780e60beb4e
font_01_sfnt_off0000e83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83E 11164 bytes
SHA-256: b9bb0c03ec6a4968e3dce6b1cc40a7c098f31871f06c83e6e30883293dc08fc4
font_02_sfnt_off00010e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E78 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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