Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db6ec8aa73e4b81…

MALICIOUS

PDF

77.8 KB Created: 2021-03-24 13:07:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54cba9849c364d55cc8ed7b091600d8b SHA-1: 794d28261a9b7efaf0d4d57706980aabc505815f SHA-256: 6db6ec8aa73e4b8194c8c7bd91aa5f2641c97e04feaf0831c9e022120e96abb4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are generated to appear as search results for a common query. One of the primary links directs to a suspicious domain, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • 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://ponafet.ru/strik?utm_term=how+to+delete+facebook+account+2020+android
    • https://fimufezav.weebly.com/uploads/1/3/2/3/132303131/wajoxokoxapazu.pdf
    • https://fitijozis.weebly.com/uploads/1/3/4/3/134372299/edb651a079.pdf
    • https://zodebosamu.weebly.com/uploads/1/3/4/4/134444592/gufuxifotodasunuv.pdf
    • https://xonuguzuv.weebly.com/uploads/1/3/1/3/131382030/6860653.pdf
    • http://3bki.ru/is_h2co3_a_strong_electrolyte_weak_electrolyte_or_nonelectrolyteqgm7s.pdf
    • http://probkin34.xyz/math_problems_with_answersyy4up.pdf
    • https://biwezufum.weebly.com/uploads/1/3/4/8/134872286/97649076896.pdf
    • https://romidanunopupef.weebly.com/uploads/1/3/1/1/131163616/6223270.pdf
    • https://roxuxafuz.weebly.com/uploads/1/3/0/8/130813852/5af87516c64583a.pdf
    • https://nesexabaxurozij.weebly.com/uploads/1/3/4/8/134898102/0f0afa6d0d26aa.pdf
    • https://biziliwedurukax.weebly.com/uploads/1/3/4/8/134889104/temerapejasu.pdf
    • https://kajugolake.weebly.com/uploads/1/3/0/9/130969904/a85e65.pdf
    • https://zukuvexoxowi.weebly.com/uploads/1/3/4/5/134597017/ba3ec0b3c604f2b.pdf
    • https://bojamaluzide.weebly.com/uploads/1/3/4/2/134265872/vesav-gojanilatise-vowiz-jikojesifir.pdf
    • http://akb54.ru/telugu_bible_study_books_free_downloadfdtwx.pdf
    • http://idealsit.space/kemper_profiling_amp_manualx9qja.pdf
    • https://tuzidatawuno.weebly.com/uploads/1/3/4/9/134902979/matuf-bofeligimajagu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_6c1e8cd3caa2440b89cb55d62f36bb7b.pdf?index=true
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_5d2c86724e39417eb402ef5cc12f89af.pdf?index=true
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_caa5904c17ef42419bd8434341837ea7.pdf?index=true
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_82850a994ded4d768777f7c808cce5d0.pdf?index=true
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_82a65d6ec112496fa1d463fa6bc24a50.pdf?index=true
    • https://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_edb2db7b948249fe8e80cd0e71c9540e.pdf?index=true
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_340e9b51e8894cc180b661665f4f36c0.pdf?index=true
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_e8c9f718e7f34c26bdacba46f7d785d4.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f05b.bin
ff485a75c8048e1675ee90bf23597e2042ef56537d5ce300713759212eba35c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF05B 5368 bytes
font_01_sfnt_off000102c1.bin
0992c0f15e1444fb8de560ca726a4888dd9271abd5e12ed882848cd65ed624f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102C1 10812 bytes

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