Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec6b64488b8f817…

MALICIOUS

PDF

85.2 KB Created: 2021-07-14 10:33:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: faae9304bab361590e4a4d01fb2ced50 SHA-1: c714b8fa7ea960e6a91a5ef494b457a13cad2473 SHA-256: bec6b64488b8f8170e6445a2155ff12fd354316d7516f7e16d477f20a45a4119
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://xn--eyt274i.com/upload/files/wujiwedowuwedatarotamusij.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/319a73ac95d3b34c725eb64db6a97bc7/25625769885.pdf
    • http://clinical-pain.com/pds/userfiles/files/95427221607.pdf
    • https://scalper.ir/data/files/file/korivozat.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/2e3fc5568d44fc4ec9f01a1ddf5125eb/nakebijobekiwiwiwuv.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075aac90da9a---ratesaradimobukosodibavod.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/norafuritivafikafezum.pdf
    • https://laplacedesstores.com/upload/file/93056164883.pdf
    • http://cuadepthanglong.com/images/ckeditor/files/6459765972.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/dhi4muauq89td1ljed1h6f2j57/94065317278.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160902bfc3fed7---20367455895.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0bfa8801d1---63092184202.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7eb593433---lukaliwijewojirip.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea4d22ae62---64393773200.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b79bcc45226---2061083015.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/7a039aa519188cda534a1693a29446b2/16402717090.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/fb7c5f64fae56d4675f65d25509ca45a/23264676271.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/7v1tsnm1rpi3b2svghu454r4v0/55470602025.pdf
    • https://steklo-shik.ru/userfiles/file/niwivelole.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b13e0f6f633---68393380156.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/4a7e3d564c678001bc6fb80c2edba8ef/78492579047.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/be30abf209c04d1116cb9ec3e78cc19b/11724794158.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adaf06aa28b---tasotasajerawotifob.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=5+forces+analysis+template
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e921.bin
0a25b638b6c51b1d7bbf7a9dd852bbc2aee75c9f461c988e8b46247fb0ad7aa2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE921 10792 bytes
font_01_sfnt_off00010203.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10203 16792 bytes
font_02_sfnt_off00011a15.bin
0937a51da9eb0a17efcc66903f82238215b272a8268b3ef65e7141fc592bdc9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A15 17560 bytes