Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5fa8361b2a3932…

MALICIOUS

PDF

76.6 KB Created: 2021-03-27 09:52:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b6de18e52f1ffb3538d61625440fc835 SHA-1: 22180a9255c8fb8d00dd3b58ac6809f3678e0b69 SHA-256: ae5fa8361b2a3932da0b6e03387c73f0b73847e3ab20a3905e1c69633c2ebbe6
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing campaign. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/123?utm_term=venice+vaporetto+route+map+pdf PDF link annotation
    • https://cdn.sqhk.co/parikozug/joiiiii/37176683611.pdfIn PDF document text
    • https://motixovelubebov.weebly.com/uploads/1/3/6/0/136085904/60f8a2.pdfIn PDF document text
    • https://getarejiviwos.weebly.com/uploads/1/3/4/6/134683174/kusatewisimalinelij.pdfIn PDF document text
    • https://cdn.sqhk.co/rofezurit/hdzghmT/30949672412.pdfIn PDF document text
    • http://ig-soft-team.com/a_to_z_word_meaning_english_to_hindilldfe.pdfIn PDF document text
    • https://nomuwasu.weebly.com/uploads/1/3/3/9/133997615/wogegejadivamizo.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/ejggeoJ/31536222675.pdfIn PDF document text
    • https://tojemiwavujiguv.weebly.com/uploads/1/3/4/4/134468879/vunaxekezuxojex.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/hJhavPK/resmed_myair_app_reviews.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/diet_assistant_jobs_near_mep250q.pdfIn PDF document text
    • https://latiratigu.weebly.com/uploads/1/3/1/1/131164156/zuzez.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/0de69859-4753-4d86-afdd-6e93c44481ac/73543884986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd7e4e1-cce6-4b01-9b10-4096ef8bde73/pokatebirizimopujigogas.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/physics_for_scientists_and_engineers_3rd_edition_randall_knight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c887bf-a775-4903-9287-de684f700c9e/how_to_reset_a_honeywell_wireless_thermostat.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/parasitologia_rey.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/96508500401.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/microsoft_powerpoint_word_search_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/ableton_live_9_full_crack_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d41110e2-edf1-4840-85bb-695a3e7f3d25/interior_designing_schools_in_uganda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e86eb456-02f0-4a7b-9a76-9ad3b6ccd49e/15668908088.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/32360717858.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_off0000eba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 5116 bytes
SHA-256: f47b79aeaada86e35c9441bde8c21bd6c879d2835805c4917b1b29fbed648924
font_01_sfnt_off0000fd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD05 12452 bytes
SHA-256: 4cf79572e1f47cfbc47aa09e3e6b82334f67395c48223731b314d47796a198f0