Malicious PDF — malware analysis report

Static analysis result for SHA-256 006fcb992f58bebb…

MALICIOUS

PDF

88.9 KB Created: 2021-07-31 14:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a2445b274e3d4ecf45f2fe4a12bb333a SHA-1: 0c68f604e0611d8fbe0f8817050f61c8c6df03d0 SHA-256: 006fcb992f58bebb7874bbf0cf5becfb289db66911c77c2f72d8874917997bd8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS upload directories. This suggests a phishing or malware distribution scheme, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://appletechsolutions.com/userfiles/file/jelurew.pdf In PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/vebamekidarorifinogu.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/keguzubinuxox.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/supevokenofotamiwu.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609307b051fb3---46084519830.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/3ee040a16a73abc02277835d41ea6b54/76249094911.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/nobajemutagerorug.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/gk91c6d0kgb2g8qmc5qaluah8f/duvafikodedobidereriwam.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/tupulasufogewomipazutili.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/diguladetedanuxozej.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09e98d8a17---9311311813.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/31867349858.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/1393556702.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d51b1c497---95781976849.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/28558800753.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810b4cda250---zefipoxorasofixizevik.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/68367192593.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/pusanenaxozosalune.pdfIn PDF document text
    • http://888chji.com/userfiles/files/sevumafiwuputixode.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/d7df5fd35b6d31b45ac6c708f5a98f7c/bopaxu.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/pulirevibetelava.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f67c8bfe53---perowolekoforijamotikated.pdfIn PDF document text
    • https://mytopics.it/uploads/file/7317143474.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=baby+day+out+full+movie+in+hindi+download+480pPDF 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_off0000f4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC6 17556 bytes
SHA-256: a41e9bd2b269f0109c7785460fc4f711c15476c898d5fed5c88e3a491512dfce
font_02_sfnt_off00013ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD8 11460 bytes
SHA-256: d87138d6fbb0911ce329da44fec2e509b43bfa652a226440493147029e784abc