Malicious PDF — malware analysis report

Static analysis result for SHA-256 578f90f9086686cd…

MALICIOUS

PDF

64.9 KB Created: 2021-01-11 00:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8027d4b06beca4288d951a0b1062646b SHA-1: 2b2711437a0400b96d21fa2b7ec3deebf7b4b27c SHA-256: 578f90f9086686cd774abea2ab3ddd0ae508ec20c919e44eb90c768f29c9312c
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. The document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting an attempt to manipulate search engine results or redirect users to malicious sites. While no scripts were explicitly extracted, the presence of numerous external URLs and the overall detection profile strongly indicate a phishing or malicious content distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=big+jet+plane+angus+and+julia+stone+lyrics
    • https://roxuxafuz.weebly.com/uploads/1/3/0/8/130813852/6725724.pdf
    • https://static.s123-cdn-static.com/uploads/4487662/normal_5fc5ecd6343c6.pdf
    • https://budojidotepaso.weebly.com/uploads/1/3/5/3/135312143/1573960.pdf
    • https://fisizupesaxog.weebly.com/uploads/1/3/1/6/131636899/1371c.pdf
    • https://golotelarag.weebly.com/uploads/1/3/1/3/131382536/003f42d82f.pdf
    • https://fapusogemewesil.weebly.com/uploads/1/3/2/3/132302858/bazamenuf.pdf
    • https://site-1177041.mozfiles.com/files/1177041/elm327_wifi_terminal_obd2_software_download.pdf
    • https://site-1176044.mozfiles.com/files/1176044/battle_angel_1993_full_movie.pdf
    • https://site-1168276.mozfiles.com/files/1168276/radio_flyer_wagon_plastic_with_seats.pdf
    • https://site-1174888.mozfiles.com/files/1174888/12742975159.pdf
    • https://cdn-cms.f-static.net/uploads/4489052/normal_5fb785b8d6401.pdf
    • https://site-1175574.mozfiles.com/files/1175574/car_bingo_app.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xisefowu/rilujomega.pdf
    • https://s3.amazonaws.com/jemazejodep/88083384831.pdf
    • https://s3.amazonaws.com/mijedusovineti/epigenetics_lyle_armstrong_download.pdf
    • https://s3.amazonaws.com/nisoxow/wheel_rim_restoration_kit.pdf
    • https://s3.amazonaws.com/buponuwebi/renerokemisime.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_off0000bf2c.bin
64b4dbbdabc972716e91c17584417b3ae85763c2ff98f327cc6c78a9e0bcede7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2C 5468 bytes
font_01_sfnt_off0000d1e7.bin
e99301ba23601ea70a15d0023df19a272d422e55e8bac0f705a43ab51b9b0951		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E7 11292 bytes

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