Malicious PDF — malware analysis report

Static analysis result for SHA-256 047dc888e6f018fd…

MALICIOUS

PDF

84.2 KB Created: 2021-08-10 10:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da537bd3e4ef7085d5edcce6e2d64baf SHA-1: 0014229d8ab7a873579bbf412858efd2ed6d0cff SHA-256: 047dc888e6f018fd08bcb1ed570f53d0554f04e1b3b52274e06bef9edb4d6380
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites and disposable hosting, a common technique for distributing malware or conducting phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 https://uzmanwebci.com/calisma2/files/uploads/jegex.pdf
    • http://wallacewilliamsfamilyreunion.net/clients/6/66/662ca4338cd1fa41fa93b88222973dc6/File/dajoresemutorepunib.pdf
    • https://synodradomski.pl/userfiles/file/lofovugu.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4494746277---pokewumemafot.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160755af89ae7c---9571999389.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/tmp/vekusexalanimibogi.pdf
    • http://walker-doss.com/clients/4/45/450b4a4af5ff3f13851793278d9c7ef8/File/43693396687.pdf
    • http://tunglamgarden.com/images/fck/file/49056348361.pdf
    • http://haithuanphat.com/uploads/files/mazanubizutoni.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/mf95i6ajj7jvrh122e1gt04g70/tidajubimivikonofonogage.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160de5c5251757---magujotowij.pdf
    • https://damiel.eu/userfiles/file/vugikaro.pdf
    • http://re-view.online/fckFiles/file/53819394032.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a642691d28e---bexukewasuzomimoli.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/95994ad9af409e21e283b8799abee307/rukorawikatumamuradun.pdf
    • http://gocep.org/data/userfiles/files/68933654336.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c4f7b042e---tuvowovopat.pdf
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/28416258020.pdf
    • http://osc-pribor.ru/products_pictures/file/borodapulazix.pdf
    • http://rowerowaszkola.pl/imgturysta/files/40785915158.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161090884bfed0---47201971800.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/ecde245ac7ea952ded716f4da4b21571/moloxabudinemikako.pdf
    • http://www.shadowrangers.live/img/files/60008320910.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=onkyo+cr-325+review
    • 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_off0000cfec.bin
d039efa25b4c04026ef8f5da25e8d80fece42dbedbad263a22d8afbc69c1eb38
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEC 16856 bytes
font_01_sfnt_off0000fbd0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD0 16792 bytes
font_02_sfnt_off000113e1.bin
00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
pdf-font-stream PDF embedded font (sfnt) at offset 0x113E1 16140 bytes
font_03_sfnt_off0001295e.bin
61346bd01864218b95e0bf6e91c50f0024aac669eb2749d0a7b58d50087546a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1295E 10592 bytes