Malicious PDF — malware analysis report

Static analysis result for SHA-256 a798da0b7128e973…

MALICIOUS

PDF

71.1 KB Created: 2021-03-23 15:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4be7d5edf6586205e375b709b2919b76 SHA-1: b8710f3aeaa2367d1be20b82b99f74661f5df7ab SHA-256: a798da0b7128e973eae5e400f78603288ed81f2d7da0f92c9baa3a85dd95cda4
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam and phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely a phishing page or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/award?keyword=vivaldi+filiae+maestae+jerusalem+pdf
    • https://sozufozixukuba.weebly.com/uploads/1/3/4/7/134730132/jopivojogafaru.pdf
    • https://cdn-cms.f-static.net/uploads/4495999/normal_6035e7718e3b1.pdf
    • https://cdn-cms.f-static.net/uploads/4458122/normal_60590c6ea5ad4.pdf
    • https://static.s123-cdn-static.com/uploads/4469128/normal_5fe15cc971973.pdf
    • https://cdn-cms.f-static.net/uploads/4370530/normal_602834f0dccef.pdf
    • https://cdn-cms.f-static.net/uploads/4409000/normal_603820fd85c0e.pdf
    • https://static.s123-cdn-static.com/uploads/4427295/normal_5fe14c4e43e4b.pdf
    • https://rewovokikulige.weebly.com/uploads/1/3/1/3/131379935/kedajo-wudaxozi.pdf
    • http://1xbet-registr.site/cloud_computing_training_online_freebjsqp.pdf
    • http://hookup157.fun/nebalobapanotiq5.pdf
    • https://static.s123-cdn-static.com/uploads/4472198/normal_600363496d8fb.pdf
    • https://zebazefapik.weebly.com/uploads/1/3/1/3/131383848/4252396.pdf
    • http://netewe8.xyz/fawibifegezulo6mllq.pdf
    • https://cdn-cms.f-static.net/uploads/4425533/normal_601a99b68fb3c.pdf
    • https://cdn-cms.f-static.net/uploads/4469824/normal_603731e4b4d52.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lunipadudatib.rf.gd/gipijaxomututigumipepuwi.pdf
    • http://kojodidekojamu.rf.gd/56622652360.pdf
    • https://uploads.strikinglycdn.com/files/b3f49b50-bb1b-4c09-8f0c-89b3ef29b155/migudogeneruvepumixin.pdf
    • https://uploads.strikinglycdn.com/files/dff645b8-b8b4-46d8-b5b5-8bab35e6a62a/chamberlain_whisper_drive_not_responding_to_remote.pdf
    • https://uploads.strikinglycdn.com/files/3526d20b-036a-4e77-b34b-4122f7c5a1dd/bulimo.pdf
    • https://uploads.strikinglycdn.com/files/419d46f5-0b4d-4ae1-b0ad-fb46f6cb00f0/2013_dodge_avenger_abs_problems.pdf
    • http://jogakedom.epizy.com/affidavit_of_service_form_wisconsin.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_off0000d6be.bin
f55131a0e6c60fcd3a9a3b477df69b9ef9e81d3bd9e0220abe9951bc74b88750		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BE 5288 bytes
font_01_sfnt_off0000e8b7.bin
1462ac29a072ab53013ad344de1abeab5c88dfd9b8878bc25f80a5077a838b34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B7 11396 bytes

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