Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2b47f04a19190c…

MALICIOUS

PDF

76.6 KB Created: 2021-03-30 16:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c939ba271a176c0fff3f4dd405efebe SHA-1: b1fd5cb8877b398d20a860b7863a20185672a467 SHA-256: 2c2b47f04a19190ccdaa750b008eb762eaee3c52dce08f9eab37144a3f21a4a7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate maliciousness, likely for phishing or SEO spam. No scripts were extracted, but the presence of numerous external URLs points to a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=what+are+the+three+main+forest+biomes+of+the+world
    • https://pumurepuwalor.weebly.com/uploads/1/3/5/9/135978845/5e20eaba8c75.pdf
    • https://pobejatu.weebly.com/uploads/1/3/2/7/132741278/zazefivulo-vesusavevu-tigibop.pdf
    • https://wiwanozamo.weebly.com/uploads/1/3/4/3/134306351/letatiwagasuz.pdf
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/futadine-dikogo.pdf
    • https://cdn-cms.f-static.net/uploads/4422884/normal_6049aa0c7ac27.pdf
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/kenufijofozozuw.pdf
    • https://fubuzupa.weebly.com/uploads/1/3/5/3/135324320/depajizeriwape.pdf
    • https://cdn-cms.f-static.net/uploads/4497359/normal_6013593375f9a.pdf
    • https://cdn-cms.f-static.net/uploads/4403119/normal_6012228036dc2.pdf
    • https://mubuvume.weebly.com/uploads/1/3/4/8/134885019/viwupekuvobe-takasunuzuw-wadasoz-buzebi.pdf
    • https://gorefete.weebly.com/uploads/1/3/4/6/134630025/4000490.pdf
    • https://tadilagene.weebly.com/uploads/1/3/1/3/131381422/xuwudibosip.pdf
    • https://cdn-cms.f-static.net/uploads/4370055/normal_602dfcd45eb6f.pdf
    • https://cdn-cms.f-static.net/uploads/4387581/normal_601418eb5f4c4.pdf
    • https://cdn-cms.f-static.net/uploads/4367952/normal_60134eaf2959a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_4b52f76ab67c4d6ba5811d1dbe88d401.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1aa0c4d0-a09a-4205-b849-4b4cfb858831/feginavijilesapesejopo.pdf
    • https://uploads.strikinglycdn.com/files/bcf023a1-c65d-44cb-96aa-060a30e00ba6/7195407754.pdf
    • https://uploads.strikinglycdn.com/files/2f3ab0bd-73e0-4f10-9944-cee31fba4422/when_we_make_love_lyrics_tank.pdf
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_a39a8ff4a94d4be4ad38efbc9c85eb6a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/347bed3d-9c0e-4c1b-8dc1-fbd1afa39eef/how_many_flat_stanley_chapter_books_are_there.pdf
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_b937562798d14c2cafaf36e6d5c8ef97.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7148affe-0490-4829-b19d-7e33e2a4d982/pippi_longstocking_1997_cast.pdf
    • 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_off0000ed56.bin
5955ba95f32547e6ec11dc03a80a3e340b3160151ed3a6e90671deb8f62b25bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED56 5392 bytes
font_01_sfnt_off0000ff95.bin
bd6966cb80eed33e543e92197d69f0dd638dd9b53ffa0614243e2bb76f57a8d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF95 10820 bytes

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