Malicious PDF — malware analysis report

Static analysis result for SHA-256 269a3f0e6f7dfeb9…

MALICIOUS

PDF

71.4 KB Created: 2021-02-26 04:55:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 101814e25e84a0c86a2644fe813c2340 SHA-1: d8c241bd938fc9d903f268c30b502670585f1a55 SHA-256: 269a3f0e6f7dfeb9bbff3697ed2e3b3c5bc692c4d15a2c972e576bdeaca08489
126 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. It contains numerous embedded URLs, many pointing to disposable hosting and employing a link farm strategy, suggesting an attempt to distribute malware or phish for credentials. The document body, though heavily obfuscated, contains references to 'Rom flash tool apk' and the authoring application 'wkhtmltopdf', which are likely lures to entice users to click on the malicious links.

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 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/wix?keyword=rom+flash+tool+apk PDF link annotation
    • https://zakuximonu.weebly.com/uploads/1/3/5/3/135346146/wodesezufabofe-nitogogul-zajoni-kumupitud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501791/normal_5fefd10122937.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/10387878880.pdfIn PDF document text
    • https://nakigere.weebly.com/uploads/1/3/4/6/134608851/gibedatag_tunej_titeli.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/emerson_thermostat_1f80-04.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/war_horse_cast_list.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/47727847830.pdfIn PDF document text
    • https://ziduxaxeg.weebly.com/uploads/1/3/1/3/131380546/f1c5c1bea.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/beats_solo_2_wireless_change_battery.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/3880339.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/81356607754.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/30511515645.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bugigumu.epizy.com/lavorasoraluvilanop.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/61236159669.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/the_game_rapper_movies_list.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/the_leftovers_season_1_episode_8_review.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_off0000d5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E5 5116 bytes
SHA-256: b97c6d4ca80c4d2564f702c9d083d548ba578c833464cd1ffc686806b2bd88a3
font_01_sfnt_off0000e731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE731 13016 bytes
SHA-256: 2181ffc0edad069b331df1e4c1b7acaae66b1061062c9b99481078814c4e70a8

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