Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dec67af103a8bf3…

MALICIOUS

PDF

78.6 KB Created: 2021-04-07 21:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e798b30ea4b005b58a0cc1ea2a514ff9 SHA-1: e1b3c7df38356311fd04196266f2a7bda5ae565e SHA-256: 4dec67af103a8bf3c2d2f173927736e7b4927b416271fbc637df829c902a05c4
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 Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The embedded URLs are likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dugedepap.ru/strik?utm_term=hikvision+ip+camera+keeps+going+offline PDF link annotation
    • https://pobanuruwogijo.weebly.com/uploads/1/3/4/8/134882751/pazolowimesusi.pdfIn PDF document text
    • https://cdn.sqhk.co/telivagawu/enheify/molipufitafevedomuwe.pdfIn PDF document text
    • https://gaburizopa.weebly.com/uploads/1/3/1/4/131438784/1b6aae30d70dbe.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/iBpJLij/tizogisorofafefujanad.pdfIn PDF document text
    • https://pumujeguda.weebly.com/uploads/1/3/5/3/135330988/gulotamumeg-fonosopided.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_6034bf1eeab5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_600f00bc283b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446784/normal_603994c1ccd85.pdfIn PDF document text
    • https://cdn.sqhk.co/fomezawelud/ifz8yNN/free_roster_application.pdfIn PDF document text
    • https://karegito.weebly.com/uploads/1/3/4/6/134626514/tetudogiwexenofunux.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/hdzL2ja/cara_main_pokemon_go_tanpa_jalan_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/iZmgVHl/capcom_teppen_characters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447434/normal_605ef574b054f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497109/normal_6051c5252c8d9.pdfIn PDF document text
    • https://cdn.sqhk.co/mosizuwowux/gjijiqt/guide_peche_a_pied_bretagne.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/eee83c.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/a4f62cb0-d4a1-4c99-98d0-e93e6a35c433/what_year_did_class_of_2016_start_high_school.pdfIn PDF document text
    • http://xolinupumilafud.epizy.com/34484112010.pdfIn PDF document text
    • http://gizolon.epizy.com/the_air_you_breathe_book.pdfIn PDF document text
    • http://depegiwisa.epizy.com/wedding_itinerary_word_template.pdfIn PDF document text
    • http://mokupemoraworal.epizy.com/aankh_maare_simmba_dj_song_pagalworld.pdfIn PDF document text
    • http://fapisab.rf.gd/51305697314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc97880-d2ff-4380-8d68-2c64285bde37/28530817070.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_off0000f5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B4 5420 bytes
SHA-256: 40f07e8e50d0c9e6a41e2884c169c5d52cb44a71c71d0cd5e7ca9013501a3bc7
font_01_sfnt_off0001081b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081B 10708 bytes
SHA-256: ce23ebdb6835af39f8d12cc7c296c28ccb9be6b44169a9eea0ff149a72911555