Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1ae1d5ff15f5de…

MALICIOUS

PDF

76.8 KB Created: 2021-06-06 04:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f66a6c7c695da67847e4bc81a6265c89 SHA-1: 8d02d4683a1c6cbb1063da4b1f87f2a7948f50ef SHA-256: 2e1ae1d5ff15f5dee9dbc6a35bd5cf225b7c224c55ac89ac4d355066364446bb
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 point to other PDFs, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the document's purpose is to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://synerhu.ru/pbw?utm_term=pokemon+all+season+in+hindi+720p+download
    • https://cdn-cms.f-static.net/uploads/4480142/normal_6056695088a34.pdf
    • https://static.s123-cdn-static.com/uploads/4480899/normal_5fc91204defff.pdf
    • https://povisegidugukab.weebly.com/uploads/1/3/1/8/131871963/3330593.pdf
    • https://vakejijumusefuv.weebly.com/uploads/1/3/5/3/135313512/puferewatevoz.pdf
    • https://dapamokosow.weebly.com/uploads/1/3/4/3/134337633/3879246.pdf
    • https://jadanimotubow.weebly.com/uploads/1/3/1/8/131856100/sofolikajab_wativebev.pdf
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/mazodivatepegolev.pdf
    • https://xixutusolorul.weebly.com/uploads/1/3/4/6/134685478/8293372.pdf
    • https://lupobola.weebly.com/uploads/1/3/3/9/133999804/7564074.pdf
    • https://loneluripovulom.weebly.com/uploads/1/3/4/3/134364014/24132.pdf
    • https://solupufaposedi.weebly.com/uploads/1/3/1/8/131857421/jibapuvesonugumogiba.pdf
    • https://roluwisotem.weebly.com/uploads/1/3/4/3/134368144/mizutapudilimer.pdf
    • https://milixugaxezo.weebly.com/uploads/1/3/1/8/131856079/81752b8f4c2185.pdf
    • https://vekaluledezo.weebly.com/uploads/1/3/4/2/134235689/750173.pdf
    • https://static.s123-cdn-static.com/uploads/4418401/normal_5fe39ea79fcfb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9b22112a-0173-465b-9317-4c0f34c9e68a/90250451075.pdf
    • https://uploads.strikinglycdn.com/files/afe2c04a-49b1-4c7b-ac12-797dab427dc8/63536639393.pdf
    • https://uploads.strikinglycdn.com/files/ec844a30-9203-492f-960a-a6cc2b114938/62800348380.pdf
    • https://uploads.strikinglycdn.com/files/a742896e-5eb7-419d-a0f0-a1ad30d98440/78368492717.pdf
    • https://uploads.strikinglycdn.com/files/08cda3aa-1289-4e9c-afbd-2e24638b8dd2/wekazo.pdf
    • https://uploads.strikinglycdn.com/files/09160636-221d-486b-8e21-8b0a2272b69c/how_to_replace_batteries_in_apple_magic_mouse_2.pdf
    • https://uploads.strikinglycdn.com/files/6837564d-0d38-409e-a6ec-4575fcd7fcc6/what_do_you_do_with_empty_sodastream_canisters.pdf
    • https://uploads.strikinglycdn.com/files/784fe951-9c5e-4cdd-b3a2-90d26fad0210/88896355082.pdf
    • https://uploads.strikinglycdn.com/files/ef703c6a-f341-484c-8b5c-00bdb3243873/28120636551.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_off0000ec64.bin
d807e9b16fa20c844ff11ac27b6c27a2914676d71f9523e89d7982e56a9fcde4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 5616 bytes
font_01_sfnt_off0000ff73.bin
55db8bf4e2e74d9a9881a2cc0fe6570341d9b2b6b3130ee26334a58456290641		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF73 10788 bytes

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