Malicious PDF — malware analysis report

Static analysis result for SHA-256 947271ab462df31c…

MALICIOUS

PDF

100.1 KB Created: 2021-09-01 05:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ab0de574badfe6184ac13f271a9ad980 SHA-1: bea76a30d45e971d2e6909ddfd816107625b54cc SHA-256: 947271ab462df31c89372e09d51fc5ca8a957f32debee7cda87015311086b0a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous external URLs pointing to various domains, some of which appear to be compromised WordPress installations or disposable hosting. These links likely serve to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://kolbandibileklik.com/resimler/files/zexasutaxujawukubigol.pdf In PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/82a77cebe89ee615302c911337a91209/15058379288.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16077d4e11475c---60079199434.pdfIn PDF document text
    • http://candientushinko.com/images/file/101476297.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/b02l07n9933pig3pno7l6obnqt/riminagaxomolemejukokil.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/53t371pmv1nkt8tbib0rc23jcg/ximesarobisivamakepi.pdfIn PDF document text
    • https://master-service.ro/images/file/daxagemuferi.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/879f94d2bb5ea49d6a35b7ee5cf843e2/gisoxowaludutoteguwuw.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/29354505842.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/689acb94efb511362a67491c3bebf570/5067335349.pdfIn PDF document text
    • http://cobmedia.hu/include/jesegulopasuvof.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/e557bb738c9a8317f9cb8d19785c52e2/57192386975.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/06d0bc38883701044ca17d718f37e24d/bosajobepagezu.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b14779ba777---31484008275.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/39530748695.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/29563256211.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/mu4rn4jds4rjs2128udhh65vn1/13558348779.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/dbc7dcbf9390b25d49dc6c096e2170d8/26692954.pdfIn PDF document text
    • https://taxiporec.top/wp-content/plugins/super-forms/uploads/php/files/avtqdm5tgm1njlac6sjpklp8l1/nojapasunobofebuguwubifit.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/53219071624.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e3dd1d52f---fukifevujelalasek.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/vopane.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160778069281b4---tarodimamojo.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/revuxifidowumugitafis.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b46c6ad227---pavoxuforoxud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=list+of+higher+order+thinking+questions+for+kindergartenPDF 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_off0001200b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200B 18576 bytes
SHA-256: 8b0021af1b7406470a043583d5370c6cc45acafa9bc95d6ed1f1c7f5b907c339
font_01_sfnt_off0001506a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1506A 10884 bytes
SHA-256: 50c047892e0730db1c59b18cda76acb090992bd0d2917b1c1cffed57eb92894f
font_02_sfnt_off0001690b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1690B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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