Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0f76d1a2ccf01d…

MALICIOUS

PDF

74.9 KB Created: 2021-09-20 09:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fae684bd2801acf10583cba75d13730a SHA-1: 0d233772c6ff04d4fc8fd0801b814da977a7e74f SHA-256: 7e0f76d1a2ccf01d10432873a9ab495df68a51d494a667b62bd2586cf7a80b31
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple distinct hosts, which is a common tactic for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16140e528dec44---13923189647.pdf In PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/piboxitasusexixobawa.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210901033536.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/jalitixanatumozamevosupe.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/4501178322.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/58838744103.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/wolamugutitos.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/28570464562.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147b14503e4e---35140665467.pdfIn PDF document text
    • https://christianschoch.ch/userfiles/file/vuduzotezaxewolagakibo.pdfIn PDF document text
    • http://xn--80adib9cjd8a5e.xn--p1ai/i/upload/files/weladaxipu.pdfIn PDF document text
    • http://toflight.mobi/attachment/ckeditor/files/172150cf08cec93eacc9ce5bfc961e2a.pdfIn PDF document text
    • http://hladonural.ru/upload_picture/potimiwu.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/4893830538.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210911191027066.pdfIn PDF document text
    • https://digicpictures.com/downloads/zinuxumepoxuxizi.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/84978180150.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210908183812_5zjvfk.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/lomegogizejijuribuf.pdfIn PDF document text
    • https://trainova.com/userfiles/file/masulasawedopawe.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/lamukebavotuw.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/jumurivedap.pdfIn PDF document text
    • https://tivirtual.com/userfiles/file/27484366125.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/jajefixo.pdfIn PDF document text
    • https://fontan-montag.ru/img/upload/govaxapuzibaxukaxo.pdfIn PDF document text
    • https://leciv.fr/uploads/FCK_files/file/65615309197.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=insanity+workout+60+day+challenge+free+downloadPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000beaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEAA 11388 bytes
SHA-256: 32b4c55e797bfd12d7586ae389626123de78d95ca1095bbc7b80fe8a2fac4043
font_01_sfnt_off0000d95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95E 17100 bytes
SHA-256: 04812fd72488948a0b3c06029e20d6503df5f793902f03be14a90fa07591f05e
font_02_sfnt_off0001054d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1