Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95ca5d01b8ec21e…

MALICIOUS

PDF

81.9 KB Created: 2021-06-27 00:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0914e2b3faedf9d6b08685f331a3a6dd SHA-1: eb12605b49cd85cb8f069a4c1783a540971d9e70 SHA-256: a95ca5d01b8ec21eb779e31f9ca4e2ade2c57ad5e62a51a2240b9251bd9ed72b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The presence of a raw IP address in one of the URIs further suggests malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a phishing or malware distribution role.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e54f91dcec---58694708587.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/f26c62dd7fa9cdfe49991f052f6e4f4a/pabidadenokufum.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/b1bkp1usi5tu26nkur9ai5hd8r/kuxiforodefo.pdf
    • http://apvn.info/userfiles/file/nolejunejivazu.pdf
    • http://stasta.com/userfiles/file/luxob.pdf
    • http://heyumpnd.com/userfiles/file///tuxilopegunebejato.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607f01b113cc0---dobadasid.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074b5dcd8be9---nugewibusajamaf.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2f7cbe6eb---19055023548.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/10k9vro0ecmqoggod00cert9b4/zukagarivejobiwo.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/1528462f2b0d33c567085e4fcc923f80/kikatilujo.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160715a6343e82---98161231009.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/3e0efcf37502ba0dd171dd735547bcf4/xofimogelikilu.pdf
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/gugagolapebusadetamexe.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609d305c65d8d---guxuvosixuropilibu.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/l387008eheeg1r95ubub7ivj74/zopojabuxowikul.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/8eqkbhcu0mjahco3fg9g6hufu5/14509510625.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983134a4b10---99546568770.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ba307f785---guxodovesedevijozid.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/9c2945f12433ed8cc40aeb17e457b635/joxunutetok.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/e9416f0dc643c8f35e80dbbb36b5c0d4/19688523897.pdf
    • https://alnahamgroup.com/userfiles/file/85410944665.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/euop6qkmg2bhgjej69j0hmht00/57411579205.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c723413dfc5---solavebokufavog.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/mgp3iq2jhcdprcjlrrpi67n8n1/44707910747.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=morning+star+history+and+civics+class+10+icse+solutions
    • 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_off0000dbf9.bin
6ad63fac846e3d01b10ad88669353bf9c9cd1c97f0788a73ffb803492f51265d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF9 11096 bytes
font_01_sfnt_off0000f5b2.bin
a79d64be01dbf10a0d487bcc4b6cfb6d4e0f740110e077f8c26f9488066784bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B2 16320 bytes
font_02_sfnt_off00011fc6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC6 16792 bytes