Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a190e926839248…

MALICIOUS

PDF

84.3 KB Created: 2021-03-08 01:54:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2a773e74e349092c8bbf4fa8dc5bcd6a SHA-1: b0159bda949bf8ee87ffbace864a108cfe8ec6d5 SHA-256: f2a190e926839248a368984167abbbbf741a816d3816ada2855fd96f0f8737d0
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to drive traffic to malicious sites. The embedded URL 'https://midufefew.ru/wb?keyword=anti%20human%20trafficking%20organizations%20virginia' and other URLs found in the document are likely part of this scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 7

  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://midufefew.ru/wb?keyword=anti%20human%20trafficking%20organizations%20virginia PDF link annotation
    • https://cdn.sqhk.co/lebereme/jaSUANJ/zombie_age_3_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/iajeGF6/kotanakitedefunebozagafof.pdfIn PDF document text
    • https://nabidojanafo.weebly.com/uploads/1/3/4/4/134455463/mijefifedilule.pdfIn PDF document text
    • https://wugepazi.weebly.com/uploads/1/3/4/3/134348030/vovubib.pdfIn PDF document text
    • http://kulapub.22web.org/awk_format_float.pdfIn PDF document text
    • https://rupasofo.weebly.com/uploads/1/3/4/8/134892789/4a7237ecd.pdfIn PDF document text
    • https://xaweworamek.weebly.com/uploads/1/3/4/6/134610398/kedegimopedu.pdfIn PDF document text
    • https://cdn.sqhk.co/fusatogis/vtjdhaH/68596563576.pdfIn PDF document text
    • http://pedurawumiv.22web.org/can_i_use_a_vitamix_as_a_food_processor.pdfIn PDF document text
    • http://jakivuxevova.22web.org/lakimep.pdfIn PDF document text
    • https://xefewovureku.weebly.com/uploads/1/3/4/2/134265706/a0c814.pdfIn PDF document text
    • https://cdn.sqhk.co/doxutijewu/fNjejea/vudake.pdfIn PDF document text
    • http://www.vbji.org/In 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/b3b12b0c-ad5c-41b7-8d7f-34af31fbbdaf/dijarup.pdfIn PDF document text
    • http://susupufewowe.epizy.com/23772854088.pdfIn PDF document text
    • http://fimageparoxa.rf.gd/38279258314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d77bb9cc-82c5-4cc7-bbcf-2e20f3fc091b/69621341184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad0f83e-6c65-497d-a15d-724b353e280f/types_of_decision_making_models_in_education.pdfIn PDF document text
    • http://pufigopinenise.epizy.com/nerewal.pdfIn PDF document text
    • http://kinutumuzikuji.epizy.com/california_osha_citations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e43918b0-6de3-4429-a062-965cf1c96493/55530696503.pdfIn PDF document text
    • http://zebuwaxeje.rf.gd/jekapotok.pdfIn PDF document text
    • http://junikul.epizy.com/26499341957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d24a709-43f2-4709-9509-8d13fd072f50/how_to_check_tivo_software_version.pdfIn PDF document text
    • http://wumoxafu.epizy.com/android_snackbar_with_dismiss_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/936d8253-5e50-449f-b13c-659a22df4397/leguxat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caa5770d-badf-46a5-8c6e-e172142c8ba9/how_many_face_cards_in_52_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4170c09d-3836-4024-86d0-5854a94ec69e/wetojupiwavamanutedul.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_off00010a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A30 5424 bytes
SHA-256: dfec8477ed8642e8c7ffe8b05d83e3e45c43ea1076d859e60c94b03221d33a13
font_01_sfnt_off00011c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8E 11344 bytes
SHA-256: 7345dc2ee677f884c3f2a65434923e5d8631b5db83ce6ab98b229b6fb239c52c