Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0a836c31045827…

MALICIOUS

PDF

74.3 KB Created: 2021-06-11 03:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 667a0fa9be8d59eb8bc54dac44106213 SHA-1: 5ce0a1580240ad3f773b81088f7267e880782c91 SHA-256: 5e0a836c310458277899d9ff9673b7f32fdc4694af1e26aabf34bb9797e595b2
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of 'utm_term=apk+cheater+pubg' in one URL hints at a lure related to gaming or cheating applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://medvor.ru/pbw?utm_term=apk+cheater+pubg PDF link annotation
    • https://godobinoka.weebly.com/uploads/1/3/0/8/130815080/3244011.pdfIn PDF document text
    • https://guwakeba.weebly.com/uploads/1/3/4/5/134597639/3b3afb949.pdfIn PDF document text
    • https://bekefopu.weebly.com/uploads/1/3/4/6/134692172/a1ea7bdc801e4.pdfIn PDF document text
    • https://tudepaweper.weebly.com/uploads/1/3/4/6/134607512/disajisimutok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416299/normal_5fc669ea1ae53.pdfIn PDF document text
    • https://jasurowifugup.weebly.com/uploads/1/3/5/3/135398944/8945186.pdfIn PDF document text
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/5b16c91000.pdfIn PDF document text
    • https://jakuxilo.weebly.com/uploads/1/3/4/7/134711712/58d665eda88.pdfIn PDF document text
    • https://jogojirodatu.weebly.com/uploads/1/3/4/3/134321770/24dc5a16e8c0.pdfIn PDF document text
    • https://puxekubokoru.weebly.com/uploads/1/3/4/6/134683715/9494117.pdfIn PDF document text
    • https://nupetumagapet.weebly.com/uploads/1/3/1/8/131859993/ee591b0b4037b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_6019935d6a251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_601c790d9112e.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/9242463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_601c5d15be47e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e65ed0e-f1ea-4186-890f-87efb24d87aa/20714416098.pdfIn PDF document text
    • http://zudilazo.pbworks.com/w/file/fetch/144563895/rainbow_rowell_wayward_son_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/328dd464-07b6-417c-a599-bde6317200b6/king_kutter_60_tiller_for_sale.pdfIn PDF document text
    • http://rajejor.pbworks.com/w/file/fetch/144752121/zigupunubujuwuzitogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9381d807-91b1-4b8b-b978-4996140ab036/what_is_the_best_routine_to_gain_muscle.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/f/vidafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88f60c58-a4f3-4a8f-95df-4c1082e2793d/why_has_my_left_earbud_stopped_working.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144416433/famous_quotes_on_friendship_in_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc6fab23-77bb-4942-aee3-0f40dd05ce21/split_back_formation_playbook.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_off0000e604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE604 5180 bytes
SHA-256: 86dfbd42bf997b0ca60d29a26c61e070c3573cd011f09a43af27178eda3dbc8d
font_01_sfnt_off0000f7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A2 10800 bytes
SHA-256: 8b841873a8947572899c16ff4f00df92356f76a7b7ec9b143573cd5fa2af08f3