Malicious PDF — malware analysis report

Static analysis result for SHA-256 34424958af9774c3…

MALICIOUS

PDF

85.0 KB Created: 2021-06-26 06:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 01dd0d1ce311891ee7e72ebe4dc638b8 SHA-1: 0dd2b7de07f4b19e1a34e8db332cd7a8f1868573 SHA-256: 34424958af9774c3896146939832b720e99d2a0ab60bfa9d1e1af32967311650
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely contains malicious content. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised CMS upload directories and disposable hosting. This suggests the PDF is designed to lure users to external sites, potentially for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://innova-perila.ru/upload/files/2485006859.pdf In PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160756ee94c48a---ziliri.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/fejokirolisexexevifu.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/14434165496.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/sdvtf3sv2o2d6otv6arv1i36jk/jizawewiladulusenoji.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606f109539111---modapisuvoj.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/62495009857.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/aks6o7njsi7foh5a963nfvbu12/sunenu.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608455d135fbd---64630059382.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16072d709a715b---47013501291.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/nte0bpunphtmjrn3nhbl3g1uh1/muwakibadodigawab.pdfIn PDF document text
    • https://asi-filter.pl/files/file/nijofomoxajiwirubu.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/jiboke.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c90b4a49b---97676960546.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfe1798fd5---sanidufuvudapiwiramulise.pdfIn PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/ad1ebb62b121469bb3eea2e444d17ccf/kajuxajosawofaxabojoxo.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/b4adfae0658a52dae9af8a2242cc65da/36395735976.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/35941541696.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/kejefefonuwuvimovo.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/pisasedotetepufex.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/jumafirewilovajisagazot.pdfIn PDF document text
    • http://derma-dts.de/files/file/wesaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=meaning+of+eyelidPDF 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_off0000ebd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E5 17204 bytes
SHA-256: 5818f3d3b954163c224a728959b4a181064eddd06e9b9f9c5a6ebb4edf2449ac
font_02_sfnt_off00013034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13034 10268 bytes
SHA-256: 2dd5415bd79a78d925d6c08528cbaf821e57de4a270b5475c286d10efa552820

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