Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05d921db3880e75…

MALICIOUS

PDF

76.2 KB Created: 2021-01-15 19:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0247f2290d2f0db96fc6ac08bedd800a SHA-1: 633e58d4b82074a8a760c076c906d1f9f352d6ec SHA-256: b05d921db3880e750d83335437217ec076360a0de54e738eb1e9de0b6a2f6c49
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a significant number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs point towards an attempt to redirect users to potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/wb?keyword=touchmix-%2030%20control%20apk PDF link annotation
    • https://wiwazojuxosupud.weebly.com/uploads/1/3/1/3/131379189/35539.pdfIn PDF document text
    • https://benipotuwazel.weebly.com/uploads/1/3/4/4/134445242/jemejevawefunutak.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/hdYhiET/top_offroad_4x4_simulator_game.pdfIn PDF document text
    • https://xixozikitep.weebly.com/uploads/1/3/4/0/134097223/e16a8d6242.pdfIn PDF document text
    • https://cdn.sqhk.co/poturofivat/ks8jfhd/32182587625.pdfIn PDF document text
    • https://site-1173894.mozfiles.com/files/1173894/6283934018.pdfIn PDF document text
    • https://cdn.sqhk.co/remavaveso/fhgcpng/34684195310.pdfIn PDF document text
    • https://site-1220870.mozfiles.com/files/1220870/onga_ponga_chonga_pardhaan_song.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/takebemanijewok/86361289106.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/addition_table_worksheet_grade_1.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/32542067538.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/buwuvogukodu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73B 5416 bytes
SHA-256: 492242fe2350beadb742a26942f4a21d7a402b25a1d88015a1323e6fa1d2af82
font_01_sfnt_off0000e987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE987 10960 bytes
SHA-256: 84647e93f97d85c07915310d61ff3afefba9737c19abb2ff25e3b6052c60015c
font_02_sfnt_off00010f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F22 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

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