Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd7750fc8e37858…

MALICIOUS

PDF

86.1 KB Created: 2021-06-29 10:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20f124db1c9b5710cfb5b678b39eb477 SHA-1: fd9acf393a4a896babbc6336432f8bc1e37390b8 SHA-256: dcd7750fc8e37858ab15aaca64b3cc318a52eaa491553692cfc9b75270cdca34
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

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://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d8cf472d7---vizasufepawixigixurebu.pdf
    • https://zold-kommando.hu/files/nukuroperugogupebararake.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a20e95f58---82298326902.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/sbcbstv3cgg6fg1qaec260guc5/mogivudituka.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba870e46340---7204390667.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/c9678d65547700c46e20eba2408c4384/59726572582.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/cac9d0badea4098fdaec902744c028c8/wexifikuwab.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/814890f20935ba71a714b95bacabe52a/jituvusujupojenon.pdf
    • http://i-daa-wl.de/userfiles/paruradosodiletukopunas.pdf
    • https://stpeterscbs.ca/ckfinder/userfiles/files/43707346426.pdf
    • https://hissekurban.com/resimler/files/39926684625.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d71191e627---70198627868.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/tnlkliq8k5pqlbaarvtnt879lj/nejinofu.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/103baa63b82eedef0003d2d904b94853/lodoweve.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e7813093b---42969738339.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d23dab435a---sitiretoxuse.pdf
    • http://ilkyoukais.com/Images/Media/files/muredolubowox.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ec79ab959---gidep.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097c86057c96---18654706172.pdf
    • https://medsplus.us/admin/images/file/figevimefinik.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078cd125eff5---63046237809.pdf
    • http://fairway.cc/images/blog//file/bagen.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+write+a+cv+for+retail+with+no+experience
    • 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_off0000ebea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 16792 bytes
font_01_sfnt_off00010401.bin
bb9db0099fa6d8a5b5fdecdbfcbb308b99ed30a0131ca2409e4aa7369fa95ac4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10401 10656 bytes
font_02_sfnt_off00011c55.bin
7196dfba68a8fdf893501ab2336eb19f6be17e2fe2da5be0722688a43f214881
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C55 17820 bytes