Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c94069136d3643…

MALICIOUS

PDF

85.3 KB Created: 2021-02-25 15:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 718e6607f13269380d63d94a5bc3f095 SHA-1: 6df473bb751c96313dff7b1a24e9dcc03d481040 SHA-256: e1c94069136d36431045b698176963cca29d86072589cab07a0afc4f6b1c5bde
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing infrastructure. The document body, though partially obfuscated, contains keywords related to 'how to work lathe machine', which is likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://seumenha.ru/award?keyword=how+to+work+lathe+machine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393022/normal_5fd85f38012d0.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/72501394552.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/0JicjcZ/best_6_heroes_in_castle_clash_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473322/normal_60038939dea51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450430/normal_6012270ec54ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373511/normal_5fcc8ac672cce.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/jj8ZjdQ/riroba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458618/normal_5fd22e3eddc2b.pdfIn PDF document text
    • https://cdn.sqhk.co/xorunase/ihqXrib/screen_time_mac_high_sierra.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_601a4968f071e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_601d504bf3d23.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/lalopedujidij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_600be71d24b45.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/whirlpool_duet_washing_machine_parts_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453105/normal_5fe36daf698d5.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/69611509941.pdfIn PDF document text
    • https://cdn.sqhk.co/lifudidu/iififNg/dikabelureki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/97777258560.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/xokelowajebuw.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/carnival_glory_itinerary_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/reportable_fbt_gross_up_rate_2018.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_off0001146e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146E 4980 bytes
SHA-256: f90d12cb528f2c891c48c8149530824f7d6179c6f93a018c0dcdcd718f6035c7
font_01_sfnt_off0001253f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253F 10044 bytes
SHA-256: 6faa40e30985d029faf9550ea76978097a4a2903ce2f66993b26db778ccbb3d1

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