Malicious PDF — malware analysis report

Static analysis result for SHA-256 0432ba2a49f88f28…

MALICIOUS

PDF

75.2 KB Created: 2020-11-17 22:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9bfcea6e4ead89651243d32e9730a32d SHA-1: 5faf45b3a8427329428ca41b8c35d57e2fee9ae9 SHA-256: 0432ba2a49f88f283c6c9a5326b2424ad9c1741ce913a27680334cd77e9a5c3e
304 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics, including a critical finding for a brand-impersonation credential phishing lure related to 'apple'. It contains a large number of embedded links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary malicious URL identified is 'https://traffine.ru/strik?utm_term=flowchart+proof+geometry', which is part of a redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://megogira.weebly.com/uploads/1/3/4/5/134590171/13580948.pdf.
  • 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.
  • 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://traffine.ru/strik?utm_term=flowchart+proof+geometry In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417128/normal_5f9ae7fe7ea40.pdfIn PDF document text
    • https://megogira.weebly.com/uploads/1/3/4/5/134590171/13580948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5fa04c159f770.pdfIn PDF document text
    • https://fuzujaloxoz.weebly.com/uploads/1/3/4/6/134684853/zadarow-telemejewujax-ramubavogekixu.pdfIn PDF document text
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/bexopepo-nidoboboxa-poxiteja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5fa09586c9b91.pdfIn PDF document text
    • https://xotukejurivaj.weebly.com/uploads/1/3/4/0/134016857/fewuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409092/normal_5f9c6b1ed03be.pdfIn PDF document text
    • https://guburumo.weebly.com/uploads/1/3/4/3/134322172/0c4ebb.pdfIn PDF document text
    • https://banavodix.weebly.com/uploads/1/3/4/6/134687022/gosazijixowak_jekovajabowon.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/sotekumubagowuwujim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/89381688081.pdfIn PDF document text
    • https://s3.amazonaws.com/juxatop/xativos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5844b195-379f-4342-9afd-6bf2f2ff288b/59860819892.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F9 5400 bytes
SHA-256: 8877cb8b53d93ead58ad005ecbab277e9a3833d69a8d8b3303a362922d9e9526
font_01_sfnt_off0000d94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94E 10192 bytes
SHA-256: 04fb88379bac457c423f5764aef0d489d7acdbbe34e543e7aa05e0b00c860ab7
font_02_sfnt_off0000fc09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC09 16072 bytes
SHA-256: f3b752e25d2e3098dc5b351a512c5ca672d2b137fcb7ddb3f81b2384be51d5c3
font_03_sfnt_off000110a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A5 6052 bytes
SHA-256: 3427bd98ed0a9df45490ff75175f9a938f028d442499195ebaf8cb7c3e917a4c

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