Malicious PDF — malware analysis report

Static analysis result for SHA-256 07551bb3315e56fa…

MALICIOUS

PDF

75.9 KB Created: 2021-02-26 03:21:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c56106d97bef0aca9bf183d2217456e7 SHA-1: 211a1785e04be8ec905bd663663afd8de2b69ab2 SHA-256: 07551bb3315e56fa55b856bb053feaf85a8e3b041d4af88128f7ec8ba45d7693
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document is designed as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=the+secret+mp3+full+audiobook+rhonda+byrne PDF link annotation
    • http://santecmb-sarl.com/bunny_rabbit_craft_templatewu5uu.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/how_to_set_a_ge_self_cleaning_oven.pdfIn PDF document text
    • https://guvixiwek.weebly.com/uploads/1/3/5/9/135976323/9828ca1b5607.pdfIn PDF document text
    • http://kieverts.xyz/devizutobaviwaxuwobp6xe0.pdfIn PDF document text
    • https://wuluvaxezipow.weebly.com/uploads/1/3/5/3/135393263/77dc8d975ad1.pdfIn PDF document text
    • http://rankingcoach-apps.com/26950990483gbzi7.pdfIn PDF document text
    • http://store50off.info/serial_para_instalar_windows_8.1_single_language_64_bitsnmhbu.pdfIn PDF document text
    • http://akvatehnika74.ru/mofitibunesu56uek.pdfIn PDF document text
    • http://my-favshop.online/does_infrared_light_therapy_really_work_for_painglhrv.pdfIn PDF document text
    • https://nuvusutapisi.weebly.com/uploads/1/3/4/4/134460305/9170389.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/97408541535.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/brindle_wiener_dog_for_sale.pdfIn PDF document text
    • https://nasuxixogidipan.weebly.com/uploads/1/3/4/7/134701521/bafc6ceeb8f05ec.pdfIn PDF document text
    • https://zulevoto.weebly.com/uploads/1/3/2/6/132696122/2403583.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/mazogawidubodabuxukeloxed.pdfIn PDF document text
    • http://kinoogf.space/7947932805celb8.pdfIn PDF document text
    • http://autobaff.xyz/weber_grill_light_7661_review4tmsb.pdfIn PDF document text
    • https://mulunumidivopiz.weebly.com/uploads/1/3/5/3/135393794/julolesi_bumudenununuka_rosopumavovoj_vudonavasodas.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/english_idioms_list_with_meanings_and_examples.pdfIn PDF document text
    • http://detonicinitalia.website/konakafutudububj8wb3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 5816 bytes
SHA-256: e5486d30c6efdce232bed61fae50ec5bad286a3acaaedd470b85bba4004345da
font_01_sfnt_off0000fc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC99 11008 bytes
SHA-256: 08867701ad4445f217fe485f9ea9862859f03ee240a4433d48ce81217a39384b

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