Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3ff29965daf926…

MALICIOUS

PDF

85.4 KB Created: 2021-04-04 17:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6c53972dd189b9a7b2d62f183db6b368 SHA-1: df608dcef685afa79ea4735360b4b10b2b5de259 SHA-256: 6a3ff29965daf926d55afed0bab19cf95f9f8f9e73fc8fcf3c0efdcdef9287b0
186 Risk Score

Malware Insights

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

This PDF document contains a significant number of external links, identified as a link farm. The primary URL, https://jacksth.ru/wix?keyword=my+free+farm+2+diamanten+cheat, suggests a potential SEO manipulation or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/wix?keyword=my+free+farm+2+diamanten+cheat PDF link annotation
    • https://nolomiwasuwizug.weebly.com/uploads/1/3/4/6/134661688/3923042.pdfIn PDF document text
    • https://kufaxalerix.weebly.com/uploads/1/3/1/4/131453821/didalapopetixela.pdfIn PDF document text
    • https://balimalovi.weebly.com/uploads/1/3/2/7/132710770/gedudaxawi.pdfIn PDF document text
    • https://biwimukapol.weebly.com/uploads/1/3/1/3/131398517/zejigama.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/pilazorumejo.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/pinuzogimoxupiluybt3y.pdfIn PDF document text
    • http://wacc-cat.org/zunizobezetejolekx9ms.pdfIn PDF document text
    • http://ygrash.website/susotodivuwufifizojikavc5jhz.pdfIn PDF document text
    • https://bofunakepubosux.weebly.com/uploads/1/3/4/3/134371141/3130745.pdfIn PDF document text
    • http://ipoteka.net/learn_calligraphy_free_worksheetsm9724.pdfIn PDF document text
    • https://pedasivu.weebly.com/uploads/1/3/5/3/135387907/bogifajama.pdfIn PDF document text
    • https://kofoxutekibefa.weebly.com/uploads/1/3/1/4/131454286/4889340.pdfIn PDF document text
    • http://get3creditscores.info/62421033760nt1r2.pdfIn PDF document text
    • http://ribuvesigofozeg.22web.org/80698250785.pdfIn PDF document text
    • http://optamorem.com/why_is_my_biddeford_heated_blanket_blinking_redy7gcz.pdfIn PDF document text
    • https://taxubixud.weebly.com/uploads/1/3/4/7/134760406/ea927.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/6284c67c-f610-4391-8908-c48162c65ac5/dyson_v8_animal_cordfree_stick_vacuum_battery_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01cae410-2501-4f05-925b-6a8088c1bd0b/what_kind_of_intermolecular_forces_are_present_in_h2o.pdfIn PDF document text
    • http://zerejikeneto.rf.gd/namegameg.pdfIn PDF document text
    • http://fofomekurun.rf.gd/citroen_c4_grand_picasso_2010_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/161ffa9e-922b-415b-85fb-5d5cd1e07949/sivakoba.pdfIn PDF document text
    • http://veduredetud.epizy.com/54296317229.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF720 5288 bytes
SHA-256: 8b1bba1393c4d881f8671ded1b04fde82d0f6b43544c619117051c2c8d7be72c
font_01_sfnt_off0001090b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090B 13092 bytes
SHA-256: 923d368607202ed64e1e2fc0d0be6f9feaee034e8b4c88ae655695aa4ed0c87d
font_02_sfnt_off000132b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B8 16076 bytes
SHA-256: 98591f62b8fab4a4c85aa030140afd8a77efa95101a51dfb8a6f790f5e97f598