Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6a672ff1ed39a18…

MALICIOUS

PDF

82.1 KB Created: 2021-07-16 04:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c79c8db34f11f766d01fd76031a466fe SHA-1: 068b84c0816135c865d94a8ffdbcc22ab1dc6e1c SHA-256: c6a672ff1ed39a184bbd9df5528c02c8980787de79698dd1171726001a302662
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm hosted on compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. No scripts were extracted, but the presence of numerous links to potentially compromised domains suggests a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/tld74dlv4ii8trevs6kf5i2721/48677919290.pdf In PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/ff52c31d09083a461aa3b2b3ed02f569/rijix.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/tikekekav.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/geiia3pefiisstv6nbh9jqeof1/rekezudutamiwo.pdfIn PDF document text
    • https://afayl.com/userfiles/file/zomejabalamop.pdfIn PDF document text
    • http://childhood-matters.com/clients/49507/File/82934772064.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/zabepatorewavu.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/36db283jbl3b5mgfb3biavdnud/95014942870.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/wevikemomavebanogavex.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1624842715.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e482dd0242d---57432649985.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/47fb3afbbdad5454e9e2613e418d9419/niwiwukunuku.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7bffd1f9c---sodajupifafoko.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/pebevufukotadetebafo.pdfIn PDF document text
    • https://vieclamxaydung24h.com/upload/files/26297583594.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/zudivizigik.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/9305501267.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5daf94363a---zaloruvazeripaxazanu.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/kinidbts1hbphni9ma7nm02ijf/75588155394.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/6n79st1ens5mfpqneesl723fs2/viretozu.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/ff5894e62ee2c3bc74ff117b2e7af3ad/jipozamapixokumexuxoni.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728d1d5fdc1---11835709154.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=i+scream+and+shoutPDF 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_off0000dc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC98 17412 bytes
SHA-256: b0ec38d3c36e3ecc19608a610c9a4f9416c46c2f5d067a2e4726c6789cc1cb30
font_01_sfnt_off00010a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001222a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222A 10548 bytes
SHA-256: 2b6f3692e093dd37ec0d567e1b5d36d4c37af7e0c626cb4fcba12255b0ad1e7e

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