Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce0d94a8f4b6989…

MALICIOUS

PDF

117.1 KB Created: 2021-06-26 03:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9241a64ceff19a252deef8b540ccc167 SHA-1: 935e4591eb607c4cda1fec484eda06dd7cb5a349 SHA-256: 9ce0d94a8f4b6989308f55718d70e9d51ced75ad2fd50d3a29ff8544c7985ba8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links pointing to compromised WordPress sites, indicating a link farm designed to host malicious content or facilitate phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/524aa2d97bf898deb34f55f1ae4913bc/68609190942.pdf In PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b207b28d4df---99214250141.pdfIn PDF document text
    • https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/oiq8jbif57l85qun614dolp4b5/51497912251.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/988aa70033f1abf502db897eece1179b/baxaned.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/p35spjhlfpl96o9jm53941peu4/45651186028.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/g1l76bakdf44sqar2kltheu6po/78541903982.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbda3a7f53---zudesiporiforalovimulatod.pdfIn PDF document text
    • http://fdscience.com/UPFILE/userfiles/files/38990962274.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077e1bca2fab---50770665309.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/30791236933.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/durefibeseruwuj.pdfIn PDF document text
    • https://okna-stv.ru/userfiles/files/mipunamadiborarabaror.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/97b35d941804eefe896278c6a0a56ae5/49140373631.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd85c18ce4---vagewoxufe.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c0eb75eae---77011226625.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087939b0d4c2---gujelojabekufivux.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ggoikm24nghia6r322asc45n9j/tunaxasonibavubi.pdfIn PDF document text
    • http://cartopack.com/Images/file/fisoruj.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/7eb87537aae83eaae364971e488e87d2/99698908994.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/0110879d2a38ff40abd2dd512751b7b4/70056132532.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/1c5f9c0389272b5de8a6498d1e4873b2/49751996227.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/95a9b3d2bd231c20fe17cbfaa86941a2/vozoroximara.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f5f5ca654---bifiredafitifuvelewojimi.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/35344120691.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/q63e7nld11mtnf21lvfrreatm1/38572888971.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/f4s13vamp69qgi1j6b6l89u4m5/nosizesikilasiwekafo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=place+of+advertising+in+marketing+mixPDF 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_off00016434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16434 11080 bytes
SHA-256: ded855b4de8ef4767727896ba57eff13d47cb261f91e30adfbcd948a72ccbd26
font_01_sfnt_off00017ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DDC 18084 bytes
SHA-256: 3813b46d57ea09de243f3a6bfa286a98476e372b5ccdf0b4774f2e84e872ea48
font_02_sfnt_off0001ad1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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