Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ecfccb0778b342…

MALICIOUS

PDF

101.2 KB Created: 2021-07-06 23:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 59d9e3cbab572888ed5efc2dcab409d7 SHA-1: aa3cb3bfd7df4ca627a186fca1f03e5b835f6219 SHA-256: 24ecfccb0778b34224f6398ebeff740e0bff49db49a34f821c7c4a6d7eca3088
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the links and the heuristic firings point towards a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

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 https://crewmak.ru/uplcv?utm_term=meaning+of+homo+deus PDF link annotation
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c791b489a---wogudixorowoxik.pdfIn PDF document text
    • https://svltv.in/userfiles/files/durodotavoluwozeteto.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/fovireroguxajeg.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/raladuvonibilujotuvanew.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/repogobutexasebok.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/vogasodadiwexularatog.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/36812915445.pdfIn PDF document text
    • https://bulgariapools.com/contents//files/vitulewuwoxexopinukaxij.pdfIn PDF document text
    • http://klpa.net/userData/board/file/murifuluvujelisotiwu.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3b9f5687c6cf475fdcbb589e8750f71a/wesidofasezekurazubibanik.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/16283796021.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/bu4rot74u33apsll76d4jc05qu/tetonudasavotunifaxeme.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42596d9f8a---runavazekizemum.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/matuzeva.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/d576e3c607097bd185ff394d42f590cc/jebazizukul.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c974e44dd70---42243537253.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160769eeecb6f8---gufuvujulidew.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/27608856719.pdfIn PDF document text
    • https://12shio3.com/contents//files/95542467339.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/9e39e6dba9af617b0fef452f5e3a91e6/10521444631.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/ak1upo8e5ra5e5unh9n1jphan5/48258132041.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/logetifudozunalixufifo.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/ecc5d0f55bfdaccfda077238c594ce89/nakuwa.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/5d836ff6e611d07c9290abad17d82e33/71694092726.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160802e6f07636---48930294292.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8a4a424e9---41882850645.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/deea174021f0db3b53491f3fbc748430/fasozabukinekezidutixo.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D44 10648 bytes
SHA-256: 20e26eb23865bea5ffd8072e47a0eca314532c21b6f97275cd0cd3a4b10cf213
font_01_sfnt_off00012532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12532 17464 bytes
SHA-256: e418b4c2a881db57f52f4a071e79ed8b41c9012cd6f13be0b7fe5f22be8e4061
font_02_sfnt_off000152d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152D0 17508 bytes
SHA-256: 945e003a8e6161fad8dc9d13ad33d6d892543f8a3ff20a3404e80a4b4c0a2480
font_03_sfnt_off00016d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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