Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1561b196ab0d48c…

MALICIOUS

PDF

63.3 KB Created: 2020-12-10 09:35:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b341cb990308d24d79e9ef7f6c731541 SHA-1: 52a39b8704f295c789e7056be193ced369133bbc SHA-256: f1561b196ab0d48cbd10c3760dfb01ac1e5cdd362f6173d34ed6ec42e721d5a9
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain metadata related to its creation, suggesting it's a lure document designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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 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.
  • 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://cctraff.ru/aws?utm_term=steelcraft+portacot+fitted+sheet
    • https://watorixaziju.weebly.com/uploads/1/3/4/5/134586039/9103793.pdf
    • https://fonevufaj.weebly.com/uploads/1/3/4/4/134444269/5039cf9.pdf
    • https://favasebuwakule.weebly.com/uploads/1/3/4/3/134328846/5594225.pdf
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/tabomuzob.pdf
    • https://cdn-cms.f-static.net/uploads/4421040/normal_5fbdd06490da2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/30410bb7-cd72-448a-bbf6-2c8b86600f75/mivetaj.pdf
    • https://s3.amazonaws.com/bededuxotulapil/the_games_we_really_want_minecraft.pdf
    • https://s3.amazonaws.com/tedowafomaru/63573197127.pdf
    • https://static1.squarespace.com/static/5fc4facdec917750a3f1d86e/t/5fcf7fe168c18617d41424d0/1607434210100/family_doctor_care_near_me.pdf
    • https://uploads.strikinglycdn.com/files/3bb2d1bc-ef0a-4088-9e92-f5f19ffadfca/tugewemobasoxola.pdf
    • https://uploads.strikinglycdn.com/files/92e468f0-a7e2-4593-9396-e838d94dbd31/fawumekosugejava.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_off0000bc27.bin
00677597c238be196cef732adbd91e4d2465484a368ceed0f5f97e55fc6cd118		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC27 5344 bytes
font_01_sfnt_off0000ce4e.bin
26b1dc49bba02d0d4ca24e5204150a8f274ea24696f6f1e0132bbc7097cac5e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4E 10160 bytes

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