Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac89ab5a36677d7a…

MALICIOUS

PDF

82.4 KB Created: 2021-03-01 00:29:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3f981f340899e25fbd8fb76aa8afb1c9 SHA-1: 007a356a917d7ce0d8555e64d7231c9a8aa3eca0 SHA-256: ac89ab5a36677d7a8eef2611730d8d061c1e51e7f1b45010ad4a319099c44725
186 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=whirlpool+wrf560seym00+leaking+water PDF link annotation
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/kiziva-pirorawogum.pdfIn PDF document text
    • https://biparobotimipus.weebly.com/uploads/1/3/4/4/134498468/movukatibiradeva.pdfIn PDF document text
    • https://musevurimimurom.weebly.com/uploads/1/3/4/7/134711136/9997d0e.pdfIn PDF document text
    • http://palaxofivuleduj.medianewsonline.com/my_passport_ultra_4tb_price.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/jg7giU5/bawulojir.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/on_the_misery_of_the_human_condition_meaning.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/how_to_use_smartparts_digital_picture_frame.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/iigegdF/22702095055.pdfIn PDF document text
    • https://gigazubexu.weebly.com/uploads/1/3/4/6/134613152/xokij.pdfIn PDF document text
    • http://dipazekonowa.mypressonline.com/95448126245.pdfIn PDF document text
    • https://valiwuvubeke.weebly.com/uploads/1/3/4/6/134694219/miwufev_virubot.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/how_many_nuclear_power_plants_have_been_shut_down_in_the_us.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/can_a_google_voice_number_be_traced_by_police.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dopovis.myartsonline.com/cuantos_tipos_de_esquema_conceptual_hay.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/94300453125.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/which_instant_water_heater_is_best_in_singapore.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10259 6004 bytes
SHA-256: 251ae0d3ac8a03588fa15d4dd8cea4d81152dbf39d983f71c3cc5fe27f4ea1ce
font_01_sfnt_off000116c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C5 11060 bytes
SHA-256: 5ec1a94328008abf0fd819e46dfe571e7f79a2806f2f5f91612d80a583c81c61

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