Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce097258063903be…

MALICIOUS

PDF

86.9 KB Created: 2021-07-20 18:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 41f431422b5f88202187d2762a857613 SHA-1: abed08a080e554bddce80965876ec4df60421b35 SHA-256: ce097258063903bee913e8c99f8b42bf0b3bb3bd070606497342f51e1c0b6a33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the nature of the URLs and the detection indicate a phishing or malware distribution attempt, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/2f1jpk6p5mc8b2545qqbmb13i2/38971070722.pdf In PDF document text
    • http://jocoseatee.com/userfiles/files/wefexidelofeniken.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17313ce462---vonifu.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/e5894f5d2ed67cb797b966caf9d865c9/21531353923.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/9gtfs2ntm497a020gk28gnfc82/41442472055.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c652dcf036e---fiwomigalududozi.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8cac8c875---71568062029.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/13003960276.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085836edf13b---wofaj.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021053000585580554.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/0e42abe600c4a2ffef3d09964c8e12e3/losilojetumedukuvokajon.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/62625455139.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/topefoxe.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/4819e1aa97f5ee0392bc46a762de291e/55774833806.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/relexesokibi.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/0bb2bc6be4d91813837599e9fd341880/56838532365.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098c630ac428---18013985102.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/ba186abae37cdf619be55fe78c4dcb11/15392960991.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609699d149558---xurikabitolof.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/d3be89185ce3839b353858e38fd3d038/refobakofox.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/27577483465.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/wabugufakefofofix.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/doxizifu.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec5124d49f6---nalojom.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/tozugixubopanefimoven.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=at+home+pectoral+workoutsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 17160 bytes
SHA-256: 59ac04a2807d7f19fef984c74a9543aaafe6de78c5be742a2d7bc58198552091
font_01_sfnt_off00011da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA5 10700 bytes
SHA-256: 088cfb8c272bd968f6351d43b78b7d87abe3f854f03feb55878e0ed18199e31c
font_02_sfnt_off0001365b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1365B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1