Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e39326d264c7593…

MALICIOUS

PDF

72.1 KB Created: 2020-12-27 01:39:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 06f4bf65d976511b69b5f47b45876845 SHA-1: 22a0eaf93d301d4c730a33108c89d36ab1124df2 SHA-256: 3e39326d264c75931d579888cd7f130cf224fe17a7a59d32bad5eff8ca327552
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://trafficel.ru/wb?keyword=hydro%20dip%20gun%20stock%20diy', is embedded, indicating an attempt to redirect the user to a potentially malicious website. No scripts were extracted, but the overall structure and link farm behavior are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://trafficel.ru/wb?keyword=hydro%20dip%20gun%20stock%20diy PDF link annotation
    • https://cdn.sqhk.co/vexedobasof/UfL0Eie/jusago.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/4341c083993.pdfIn PDF document text
    • https://cdn.sqhk.co/xonivozew/BidgeQT/wifexinogelarolub.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/698a6b376.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/zijaf.pdfIn PDF document text
    • https://cdn.sqhk.co/kezulegol/dM4haih/pulse_oximeter_readings_normal_pulse_rate.pdfIn PDF document text
    • https://daxedinojadu.weebly.com/uploads/1/3/4/5/134590150/8075774.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/LwjeTbR/22618449105.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sabobenuwe/xuterolatev.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/margins_resume_cover_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6052b9bb-1eb9-48c4-bccb-f4d58372bcb3/17967345776.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/android_app_splash_screen_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a354b8be-e935-4ee8-bf64-88691c588158/72773972323.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/14435103521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5920c5cd-f361-47e1-9388-b91bccf853ab/mobile_legends_cheats_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/92848428549.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD117 4892 bytes
SHA-256: e787a1c750b71d2207997a5966842fef95e8503563547bf2cc85605330f53811
font_01_sfnt_off0000e1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D2 10448 bytes
SHA-256: 20eff2833119d48d76de6ef38b89dfed744f3b80c6948d68f9f36074834322f2
font_02_sfnt_off00010577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10577 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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