Malicious PDF — malware analysis report

Static analysis result for SHA-256 11658af162cf8498…

MALICIOUS

PDF

82.9 KB Created: 2021-07-04 23:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2187f2bdcbf39588f4216aefdde2f033 SHA-1: 35ca8dacdf83dc9aebca5787e46967b7fd917ebf SHA-256: 11658af162cf849863f76e9d1339a9dec2d0c17522ca7f9486f28d3de664485e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by a machine learning classifier. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://smidgel.ru/uplcv?utm_term=how+do+you+separate+magnets
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b88108a43---wakokilokakuluzoruf.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d878edbc6---57742415367.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1b02f203a---79774557410.pdf
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/zumumadosuro.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/hui4uo87g4lbr8tdhao3g88385/81921694708.pdf
    • http://afghansolar.com/userfiles/file/80293599728.pdf
    • http://ypperfect.com/ckfinder/userfiles/files/21688127266.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/3a5501cd7e166ed4012c35fd3f0fc776/kumubogoguzupu.pdf
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/xenoretuwinimatobedelame.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d367d06d6e1---lowejipaxeparoto.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160b588349bcdc---54180332190.pdf
    • http://ricarda-allegra.de/userfiles/file/lipejomubunotadiwidudewek.pdf
    • http://cichanski.com/Upload/file/dimiwegi.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/eiho4h5qqbm04l0cdfejoe1sba/56535059963.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160acbea644289---751045477.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c18c730c7de---68688872319.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16081f3fc50799---xitesimemizi.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d16dc6428---fisajij.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd1cee8919---26341273832.pdf
    • http://briarcliff68.com/clients/71184/File/93055498037.pdf
    • https://kopari.hu/files/file/vebafa.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/11b17d9e2bb30ba5d7b0d847d4533130/27889961704.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/61b56c7914fed09ba5ad9e1da781a7f4/71213796136.pdf
    • https://campermagazine.tv/public/file/nuwafomotim.pdf
    • 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_off0000e0d4.bin
426d704473cb495b9464f59374b0b1a143a8a08401f044d0c6a7efb5beaba1bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D4 17244 bytes
font_01_sfnt_off00010d5e.bin
464d89fb8df5b9468f8d29a50083b4fa15686f41e31478f3309c4651d3952a5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5E 10888 bytes
font_02_sfnt_off00012666.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12666 16792 bytes