Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a6ae640a2b8b2f…

MALICIOUS

PDF

77.8 KB Created: 2021-05-11 22:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 743ee72732adc16c0534cce83823fe9c SHA-1: e5fdb1758dedca14cfbb1b3bb8ab55c9124eabc7 SHA-256: 91a6ae640a2b8b2fdee00ee8480e1baca5202dd46fb874c9c4f1064c3a88edc4
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. The document contains numerous external URIs, with one prominent URL pointing to a suspicious domain, suggesting it functions as a phishing lure or a gateway to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is part of a link farm hosted on disposable domains, a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://druttle.ru/strik?utm_term=replacement+parts+for+magic+chef+stove PDF link annotation
    • https://wejobufobugof.weebly.com/uploads/1/3/5/3/135348322/7272123.pdfIn PDF document text
    • https://dudegakabiwuzab.weebly.com/uploads/1/3/1/4/131406663/datunibumujen-bunabogasuw-marog-xuzix.pdfIn PDF document text
    • http://tafakiduwav.scienceontheweb.net/how_to_set_the_time_on_my_citizen_blue_angels_watch.pdfIn PDF document text
    • http://cosmeteca.com/loxuziw2vdiz.pdfIn PDF document text
    • https://cdn.sqhk.co/tojegaxamox/cOgjiaT/lafigejewomogowumu.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/what_is_the_tone_of_act_1_scene_7_in_macbeth.pdfIn PDF document text
    • https://cdn.sqhk.co/kowaziwaso/whaQlgd/hacker_simulator_tycoon_apk.pdfIn PDF document text
    • https://nosodelutota.weebly.com/uploads/1/3/1/8/131857544/0a3dc071f3b.pdfIn PDF document text
    • https://pasosawa.weebly.com/uploads/1/3/4/7/134737133/9374245.pdfIn PDF document text
    • http://favunewesazut.sportsontheweb.net/advanced_excel_functions_for_data_analysis.pdfIn PDF document text
    • http://liketsven.xyz/143549861052odjh.pdfIn PDF document text
    • http://rawiduti.medianewsonline.com/72065667758.pdfIn PDF document text
    • https://kumenesasewoton.weebly.com/uploads/1/3/4/7/134773405/9823374.pdfIn PDF document text
    • https://cdn.sqhk.co/murefazomejo/if6ihjf/spending_gems_idle_heroes.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/cPQihbM/motorcycle_traffic_rider_hack_ios.pdfIn PDF document text
    • http://qrastenmap.online/brave_2012_full_movie_in_tamilxbge4.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/6e444fa1-7e33-4170-ac94-988b3e3283f7/50036860826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ddc884-d616-47db-b752-2d0ee248f300/can_wine_give_you_belly_fat.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_off0000f1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CD 5496 bytes
SHA-256: 959ed4f52b0b559dd54d71ecfcdb7606884b5863caa735b2088f9e2001b5ce9f
font_01_sfnt_off00010460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10460 11060 bytes
SHA-256: 4fa5f0ecefe8325eaf14a39fba9e76a207cfc8b80509992580c6496d6096bd5c

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