Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ab7ebcdf22a13a…

MALICIOUS

PDF

74.9 KB Created: 2021-03-31 20:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d981b1aa8e1088b9d8c36ae293fa412f SHA-1: 64dd6df663a412188ad0d9a91bfe149a69a6dc15 SHA-256: e6ab7ebcdf22a13aaccfe0b457114d7b11cdbaf2eb9ca71268572d7ee4a179bd
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains, indicative of a link farm or SEO manipulation tactic. ClamAV and ML classifiers strongly indicate maliciousness, with the PDF_SEO_LINK_FARM heuristic confirming the presence of a link farm. While no scripts were extracted, the embedded URLs suggest a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://lozipotod.ru/wix?keyword=wayne+bozeman+funeral+home PDF link annotation
    • http://kukushka.space/laxivivokesavomoretivuje7yi1y.pdfIn PDF document text
    • http://zanartcc.net/distributor_and_consumer_management_system_report_moduleb4xsx.pdfIn PDF document text
    • https://vewufozokan.weebly.com/uploads/1/3/1/0/131071297/4205019.pdfIn PDF document text
    • http://discount50.pro/victoria_2_hpm_guide2beo0.pdfIn PDF document text
    • https://gupovokezatiku.weebly.com/uploads/1/3/4/8/134878629/bonavewabojojedavub.pdfIn PDF document text
    • https://tererenigi.weebly.com/uploads/1/3/1/4/131405956/romol.pdfIn PDF document text
    • https://dimakevumegipex.weebly.com/uploads/1/3/4/3/134352849/2829695.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/5212627.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/gazivemon/48342531594.pdfIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_22a23c3ab99447f292a53aa95cb35948.pdf?index=trueIn PDF document text
    • https://6c892e0d-5736-4b4a-96a3-cd490fd1fe3d.filesusr.com/ugd/1407cd_5c181fb8ef65412a914106be3498040b.pdf?index=trueIn PDF document text
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_455f5b32c30e4b31abc636af613bac55.pdf?index=trueIn PDF document text
    • http://sajobovu.epizy.com/capitalization_worksheets_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/current_issues_in_the_philippines_2018.pdfIn PDF document text
    • https://56352102-112a-4456-a677-0775450c4ed3.filesusr.com/ugd/ed4e87_6bb458cad25345a281a39a17f12e5345.pdf?index=trueIn PDF document text
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_b1d32f00e2474db88cf6c8c5575d3db8.pdf?index=trueIn PDF document text
    • http://tokaluwog.rf.gd/61789470437.pdfIn PDF document text
    • https://7a69a04d-b0b3-478e-a927-895b34d3dd44.filesusr.com/ugd/159848_ab38693fff7a4562b2502e4fafcfe892.pdf?index=trueIn 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_off0000e95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95A 5132 bytes
SHA-256: 89dc91a217c5403a2088e2626921e806659a9a86251d884dab3a67e4218bf50c
font_01_sfnt_off0000fac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 10556 bytes
SHA-256: 926787947fba258de72c260cb2e56468b3eda33c4bad1a5d5ecb273c397247f9

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