Malicious PDF — malware analysis report

Static analysis result for SHA-256 32045a68e5471149…

MALICIOUS

PDF

86.5 KB Created: 2021-06-07 03:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 07feeda404218fe6ee35147495ee2de7 SHA-1: 3c1aa013a76218a89b4ac7172d0bc31043eac7f7 SHA-256: 32045a68e547114939e179dafebe412b3ac1bc0f43632827b11fdb2344055a03
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The heuristic 'SE_PAYMENT_REDIRECT_LURE' suggests a phishing attempt related to financial information. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to lead users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://synerhu.ru/pbw?utm_term=foolproof+module+6+test+answers+economics PDF link annotation
    • https://xomiwisaxi.weebly.com/uploads/1/3/3/9/133999446/nalumeraniluzo_paguduku.pdfIn PDF document text
    • https://vunojomilubokub.weebly.com/uploads/1/3/0/7/130775688/3009832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390637/normal_5fd12310a4535.pdfIn PDF document text
    • https://banavodix.weebly.com/uploads/1/3/4/6/134687022/8553394.pdfIn PDF document text
    • https://nirotagikul.weebly.com/uploads/1/3/5/9/135992947/01aa662.pdfIn PDF document text
    • https://wapaberupuz.weebly.com/uploads/1/3/5/3/135397773/rodetokoj_sujusif_xozepotegifini_dutiboziw.pdfIn PDF document text
    • https://nobigifawu.weebly.com/uploads/1/3/4/3/134310244/ee73b4.pdfIn PDF document text
    • https://vagibize.weebly.com/uploads/1/3/4/6/134618654/8657479.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388183/normal_5ff3c3d007175.pdfIn PDF document text
    • https://sujutojulaj.weebly.com/uploads/1/3/4/3/134359820/bubutunitagojevitata.pdfIn PDF document text
    • https://vekafikag.weebly.com/uploads/1/3/5/9/135986004/zamiwolowimiwevog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418558/normal_602230248e80e.pdfIn PDF document text
    • https://libepuve.weebly.com/uploads/1/3/1/4/131407284/tafiliveruzisazun.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/1ae89ce1-bab9-43c8-b180-872bb8cdd9f2/5463162189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28aee73-952f-47d9-a689-41c8ad6cf30b/82291883383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/093974df-d71a-46aa-83fc-56cebb2ee0e5/33214425809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d569016-776b-4b5d-8d8c-b802e1a15553/32596516211.pdfIn PDF document text
    • http://fuvotobike.pbworks.com/w/file/fetch/144557235/xovimavozanekoba.pdfIn PDF document text
    • http://runaliguredu.pbworks.com/f/99070261005.pdfIn PDF document text
    • http://kesowununak.pbworks.com/w/file/fetch/144761541/ga_form_600-t_instructions_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e292953-d271-4d27-9253-5854f6d7f29f/8631976586.pdfIn PDF document text
    • http://felefejimax.pbworks.com/f/61729681976.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_off0001128c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128C 5500 bytes
SHA-256: 6f6c8cb12d536ef83dbd856cdba80ac5d3e467c0683f1d8c1a3aa200bae35732
font_01_sfnt_off0001253e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253E 11552 bytes
SHA-256: 02627d11ddce37c66a8fad96adb2c9c215f66cacbb48def32250b928cc947e15