Malicious PDF — malware analysis report

Static analysis result for SHA-256 cacf4e32aba6c8e9…

MALICIOUS

PDF

74.5 KB Created: 2021-04-04 23:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: cfd1af17bbfe3d9936a2296b8315ba2d SHA-1: bc6e833c738a761a2b126c50ac1f29b5cebf8f98 SHA-256: cacf4e32aba6c8e93c67587292fc4e78ad6d32a0a78e1b2cad59c00449f4ea35
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The primary malicious URL identified is https://dugedepap.ru/strik. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://dugedepap.ru/strik?utm_term=bergey%2527s+lincoln+service PDF link annotation
    • https://zipebamaxotunev.weebly.com/uploads/1/3/2/8/132814247/3a0d009.pdfIn PDF document text
    • https://subefurova.weebly.com/uploads/1/3/4/5/134505332/jukaj.pdfIn PDF document text
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/3842558.pdfIn PDF document text
    • https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/safemelusofiku-bowuneleb-fowemajepupufew.pdfIn PDF document text
    • https://gibunuvupu.weebly.com/uploads/1/3/4/7/134746488/1f0bac5b6c.pdfIn PDF document text
    • http://lidobexi.22web.org/40396924271.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/eWEjcja/sipoc_analysis_template.pdfIn PDF document text
    • https://cdn.sqhk.co/nadevukoved/mTfP3GF/kewovakuxazexorekepileti.pdfIn PDF document text
    • https://cdn.sqhk.co/wifuponi/j5DNGAF/retired_police_officer_jobs_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_0958aadaad9b4111ba3965ad6330ce60.pdf?index=trueIn PDF document text
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_ab66e38bf9db4c8fb9c895c82fc259f8.pdf?index=trueIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_764221b0bc2f4be8abc8db7b87f69ad4.pdf?index=trueIn PDF document text
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_70661448de6642ad8bb5f437a7837686.pdf?index=trueIn PDF document text
    • https://57eba762-b826-4879-8d7a-7f480aba2934.filesusr.com/ugd/e89c2b_0547c4b023404998b53e8f352463acf5.pdf?index=trueIn PDF document text
    • http://kesofuleradazod.epizy.com/antivirus_bitdefender_2018_full_crack.pdfIn PDF document text
    • http://kakigonameta.epizy.com/dofive.pdfIn PDF document text
    • https://e79dab91-b8ca-4f03-a7cf-74564eaa1d8a.filesusr.com/ugd/009cd4_1035e8cccf2543138cb83cab30a4bb21.pdf?index=trueIn PDF document text
    • http://ledukuxadom.epizy.com/acdsee_free_for_windows_10.pdfIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_7fd557f86309469cb7c2c6c8f1b4c204.pdf?index=trueIn PDF document text
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_87ddf103473845acbdb6652c7e59e3d4.pdf?index=trueIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_6c7aad112fbe46af8ca3463f7d48e1ef.pdf?index=trueIn PDF document text
    • http://pikegasek.epizy.com/ruud_silhouette_ii_gas_furnace_not_lighting.pdfIn PDF document text
    • http://xuxerikafirin.epizy.com/ck2_conclave_guide.pdfIn PDF document text
    • http://wemopax.rf.gd/92612894311.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE586 5004 bytes
SHA-256: c2d6efa5b3b7d777e28386441f03772c81a8ce6021e1e926706d80a88e1ab6f3
font_01_sfnt_off0000f6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BC 11044 bytes
SHA-256: 026524cfa00b4fd1ea9401e1b23c5dc6a81551981ff00f3677c6abe5206f840c

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