Malicious PDF — malware analysis report

Static analysis result for SHA-256 b054e3118ae4c084…

MALICIOUS

PDF

117.6 KB Created: 2021-07-02 22:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6963fb6d1d0bd3391417201b20ad8f32 SHA-1: 1705fc3cc83e0b5a020027d5a65f49891845f2cc SHA-256: b054e3118ae4c0843ef908a3503cfc12792fbd88a17637310981374ba9ae4928
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 an ML classifier as malicious. It contains a link farm pointing to numerous websites, many of which appear to be compromised WordPress installations or disposable hosting. The primary purpose seems to be redirecting users to potentially malicious content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9688

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://rebizplus.com/userfiles/file/4753406097.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/kale3eeb94enei7e82jsl8vuoh/52864663070.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a418a6443e1---47902021761.pdf
    • http://szpitalstrzelin.pl/userfiles/files/tofovodaloxatumid.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41a85b7a4---29751519485.pdf
    • https://tenfci.org/userfiles/file/34825926967.pdf
    • http://copingconversations.com/userfiles/file/xupikikopex.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160840ffa645cc---16154687662.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab74137666d---87397212070.pdf
    • https://alianzatours.com/imagenes/file/pawaxaxisiza.pdf
    • http://tauzetaques.com/clients/1/1b/1b95303171b4519794d6fee637ef680e/File/84510207094.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/p3qhq4t29q3tbkbbjrmfoi9vlt/96154326001.pdf
    • http://travelport.pl/userfiles//file/zutafojesuvijok.pdf
    • http://csim.jp/ckeditor/uploads/files/62192221913.pdf
    • https://alice-immo.com/userfiles/file/limumaropudukivazed.pdf
    • http://md-servicios.com/userfiles/file/21251563736.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7df18847f---nupenu.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/1hojcsosooasj8mi70ildukfn1/vifovaxesibix.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/6d26ede01ea8bffc3031956a2e49bdc7/diwafikokokebaxu.pdf
    • https://ancoraeducacion.com/images/runem.pdf
    • https://humicdp.com/uploads/2021-06-17/images/files/mujafuxoxevojipazajoxotat.pdf
    • http://bosch-service-center.ru/uploads/files/64095695273.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870a03d41ea---25513300900.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/4b19a23d08fea59131c9d431fd59b9ae/82095851798.pdf
    • http://rajskiewakacje.pl/userfiles/file/pujulaxafuf.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=hamath+meaning+in+bible
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000133b9.bin
63d9bb60fd7588968ba68aa6e657d498e8533ba255fb1c759ebf965944b91695
pdf-font-stream PDF embedded font (sfnt) at offset 0x133B9 23048 bytes
font_01_sfnt_off00016dec.bin
13b33947965b51c70056a792726fa7014058ade60125f923b8235601505450eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x16DEC 19156 bytes
font_02_sfnt_off00018e07.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18E07 16792 bytes
font_03_sfnt_off0001a61e.bin
55676d78bc6e7695d48ef834566057fe14afbfdc7cf88d490d3c0dcd7ac4e471
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A61E 10296 bytes
font_04_sfnt_off0001bcf7.bin
e263a56b6704e9cd408c901b13382985de1cb8b3c05de99560f928a7ce6856a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCF7 2152 bytes