Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2364afc1afbba89…

MALICIOUS

PDF

86.3 KB Created: 2021-10-06 19:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 9d3350af2d0c36adc4ee2ec2b59d155a SHA-1: 7e76ce10785ba58ffe4ab6f320728dfc86a6b26b SHA-256: e2364afc1afbba89204d3d4145fe9a72c89108374dea1b3666e0623e9590fd4c
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of numerous unknown URLs suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://parkergeneralcontractors.net/userfiles/file/sinufeneparidebazorupib.pdf In PDF document text
    • https://volnynaklad.cz/data/file/86819275305.pdfIn PDF document text
    • http://htwy.com/upload/file/87445124305.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/1f98ff7fb5d2e01f2c992167c2958d85/83516582992.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/kotodovokotarasaze.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/53092893702.pdfIn PDF document text
    • https://flomogroup.com/upload/files/tekoviguj.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/84490572194.pdfIn PDF document text
    • http://hzhuacui.com/images/upload/File/rexesilimuxikoribif.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/xamedexewetabe.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150293f54eae---zeleramemos.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161465b11579e2---nazudi.pdfIn PDF document text
    • http://xn--bqrr0jw6bmw2g.com/userfiles/file/1633468428.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/98496575437.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/33639465026.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/42831232683.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/19149138993.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/pugituk.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161599ee1bd07d---kefubapipubenebudefimori.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/40955095130.pdfIn PDF document text
    • http://bosch-elektronarzedzia.pl/catalog/file/loroseruvemajotafamasimux.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/50108145546.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/nuviduboxagel.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/kovitumivemojege.pdfIn PDF document text
    • http://kkc1.org/htdocs/cljr/data/files/98127245370.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=tell+about+yourself+in+job+interviewPDF link annotation
    • 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://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_off0000e62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62C 10804 bytes
SHA-256: 5f3a08c09d6228cd835670e70270f0b66196d661abb11977ad2c92b04956c1a5
font_01_sfnt_off0000ff3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3A 19776 bytes
SHA-256: 0ca3ab222465cc2afd656aaafb8ba078794716ad9ca8f198f51c694694e6db37
font_02_sfnt_off000132e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1