Malicious PDF — malware analysis report

Static analysis result for SHA-256 778b1ac9441043d2…

MALICIOUS

PDF

71.8 KB Created: 2021-09-04 01:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: eae928c840def4ddb944ec46bc6f06b4 SHA-1: 9f9e13d675c7ce600758fc1fac2a4143889a477a SHA-256: 778b1ac9441043d2b4a44c28877d113ef34bf76b986203849751f9f47782ab4f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to external websites. Some of these URLs are hosted on compromised CMS upload directories, indicating a potential distribution or hosting mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://poddertradingandindustries.com/userfiles/file/27982920382.pdf In PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/tokeka.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/xojenagubupizatuzex.pdfIn PDF document text
    • https://toocapen.com/files/37444254553.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/zalokavifudiladurumo.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/93812325518.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/rukavavedubabotib.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/c63cc4149deec6207a5b5a77732242a0/67921858786.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/getaxofokuwu.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/ao2789m3ioov6753rsfn03ifs0/katunobibade.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/lifibenosesi.pdfIn PDF document text
    • https://digireg.si/upload/nejarutenawekikesopunuji.pdfIn PDF document text
    • https://yorapp.it/file/23447450371.pdfIn PDF document text
    • https://ivaco.it/file/rekijavinunojadidimivo.pdfIn PDF document text
    • https://local-atlas.ru/userfiles/files/20172033242.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1fd31171f---13846357330.pdfIn PDF document text
    • https://highrise.pl/file/85488949830.pdfIn PDF document text
    • http://duythuc-bearing.vn/uploads/userfiles/file/valakiwitobogoregedo.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/55003684404.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8c8a492b4d---49484124778.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/2v1cf6au1pcmtlpbdipvbcgd2r/karazasarulebobom.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/vb42t31dlhs1bnh7k7760ih23m/sawegejogujowizifoxo.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/zisidarivunedimezowige.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/xunogoraxapavadit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=downsizing+and+restructuring+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB84E 15704 bytes
SHA-256: 33d6036845265d4b9968442ac1c4774ddeaf5b07954c62cf006c02c7dc88b607
font_01_sfnt_off0000e001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE001 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF818 10996 bytes
SHA-256: 8136ca3c1659ee0d25abe9440e3fa69f60ac6ad949d9b4b3ad73682cdd7a644a

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