Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd4515b14bd82b0…

MALICIOUS

PDF

80.4 KB Created: 2021-09-07 06:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e93bb4fb60aaa92a5235c10a10cb7b4c SHA-1: 802c52afd013aab5823109bd66f2636fe641f657 SHA-256: bcd4515b14bd82b099b3f6adb11d3e5912e4fcfd233d382fe1b466265f8a7886
176 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. The presence of a raw IP address in one of the URIs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest malicious intent. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://afro-safari.com/upload/files/kanotokexanukivofan.pdf In PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/fb75a354c1fb7b1642a577fa66e145b2/luxavemizesidojelafafegil.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f9597e9c0---sosupiwoz.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/25766393788.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec23fe8233---rurukukozage.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/vezetaviwatalus.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/36139680720.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/2976a521b6ecdd7bb6a1e0f80b6c3587/518004285.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/liwekode.pdfPDF link annotation
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/87da7cfad0536c1dd7d13f83a2c3afed/nofagugomazumuruj.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b488b1237b0e559c78bad27e7d78d6aa/lesaz.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfcd2b0e4b---26149425569.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084295a81edb---56592137844.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6f094b993---metabemozode.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b064ab917af---7697072625.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/19947635063.pdfIn PDF document text
    • http://asfalon.com/__files/file/xinimabofenejidinuvutu.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/xawodamezuwamutup.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/guzebazemaradof.pdfIn PDF document text
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mufomurumoz.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210703094234_kc70p9.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adaea0d6874---43275875704.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/sefefekozos.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/8440306756.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/zajogalonikiloreremura.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=modular+operation+theatre+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD494 10520 bytes
SHA-256: 29ebd3227518dfbb7604be877dcd0151c022fb183b5e57c03e77916314b30a8c
font_01_sfnt_off0000ec63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC63 18472 bytes
SHA-256: 39126a91106b708e3145a7552e7e811aa110f5e68ec7dd4db501a2e773078f62
font_02_sfnt_off00011c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1