Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc166c3d96f6d47…

MALICIOUS

PDF

109.3 KB Created: 2021-06-25 19:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce1d263e582a8f43f55af080ec7f4690 SHA-1: f295b47cb1fe4c0b30e114ad70bd0392954e064f SHA-256: ddc166c3d96f6d47f027a18b555cc6277a2d116b731f765f86e7829999a63871
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malicious files. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier score of 0.988 strongly indicate malicious intent. While no scripts were directly extracted, the structure suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae78460306c---89942843526.pdf
    • https://fertilizerproductionprocess.com/d/files/zesaburukudegi.pdf
    • https://alakharia.com/public_html/userfiles/file/bofukidofil.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/podcnugl5rc6geqvdh6u79ffa7/13644343045.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ca8bf29f8---mofusaxuterenupizakisiso.pdf
    • http://mjsolankifoundation.com/fck/imagesfile/46233107525.pdf
    • https://pima-alarms.rs/slicice/file/gosagufigolugifovemaf.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082635eaf3b8---46423538362.pdf
    • http://oilmachineydy.com/d/files/lurodurebalabalibunamepas.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3bd213675---44143406016.pdf
    • http://hataylezzeti.com/resimler/files/43747954817.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/d523e93cd081729cdecf616c43f68be2/getimevarejugewovalepu.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ae4cc7660---dufodakomikewasirawenole.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf04e3afce---tiregivigulofezorogefer.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16083604c7b385---82434766462.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16087ea867aba3---70940063715.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/69eb131af8f8b8b834c1ff5f2c5a3690/60060418991.pdf
    • https://adtw1.com/ckfinder/userfiles/files/gibevik.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcc8e0e553---pukenexoteli.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bad07e424f5---21790048027.pdf
    • http://criollo-cocoa.com/userfiles/file/72122495388.pdf
    • https://aimhc.com/userfiles/file/2747422667.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097831c9a3e5---mezibo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=amharic+keyboard+free+download+for+pc
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012df9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF9 16792 bytes
font_01_sfnt_off0001460a.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
pdf-font-stream PDF embedded font (sfnt) at offset 0x1460A 16092 bytes
font_02_sfnt_off00015b50.bin
fb935de6a10dc77065085f41dfccdd3d7607c2e43afcc08701847100909d80ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x15B50 11032 bytes
font_03_sfnt_off00017495.bin
d675ee813c3d358f7be042c57f2d52351a3a7b4a68757e33966ce05a97608489
pdf-font-stream PDF embedded font (sfnt) at offset 0x17495 18452 bytes