Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa43dcefa0b4036f…

MALICIOUS

PDF

85.6 KB Created: 2021-06-29 00:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d314b251303911c7d830ebdc201e4c2d SHA-1: 62e8b2080c1c30c3e871bf372415e9771cb85052 SHA-256: fa43dcefa0b4036fc02b703ceb8e8a6e136423a2ee9964941b001a5a3d659629
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/1edbc12d045136001050ea003429cc18/sipateridamil.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba06955da1---funowogatobupin.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/0742adaa6e773239db4ae5bdb93743ba/25566750237.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/f743ede2ebf7f2a24d49ae3329ffa3a3/nurofepobuwaruxetusezumeb.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f70a53350---wedatamigalajada.pdf
    • http://truhlarstvisollner.cz/data/file/rupowexojuxofejerel.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/b24ik8a90pigmro3n8pu92diub/99232758181.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/7efb5ad55b15911139f12f8d0309e095/podej.pdf
    • http://pinzimoniofiumicino.eu/userfiles/files/dugikubi.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806f2cd71c6---26991583988.pdf
    • http://anatolianlgs.com/userfiles/file/falazesimaximogo.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/936ad9591063c57e73a7652aca22c9d9/pajolegovotepatotizipez.pdf
    • http://hkalc.com/userfiles/87140169542.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/48898d078669e58bda597f7f5e275491/71798860612.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/pisawoliwatujonazigob.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/jtknscjabhb707ou2bhhuss2mk/pudimesaferegumakevos.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c00cf2c7ebb---budufo.pdf
    • http://staceyasp.com/UserFiles/file/91057085186.pdf
    • https://burlingame.com/wysiwygfiles/file/zujuwu.pdf
    • https://sfasg.jp/js/ckfinder/userfiles/files/reviwizipuruxorurovenerav.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/7f85955441551eab45339006eeb2aabd/84856365621.pdf
    • http://sintellect.ru/Repository/file/sobasatigewerag.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=sitxccs007+enhance+customer+service+experiences+answers
    • 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_off0000e89b.bin
bc07c52a4ea2290cbe0619f782af82e760fe036291d4ac496939031c27e7a302
pdf-font-stream PDF embedded font (sfnt) at offset 0xE89B 17684 bytes
font_01_sfnt_off000116b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x116B4 16792 bytes
font_02_sfnt_off00012ecb.bin
d7edf13472901898f4f957c5cd06097dc0fd16e136518d6ca786f8fc8ab8ac59
pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECB 11192 bytes