Malicious PDF — malware analysis report

Static analysis result for SHA-256 c415071293449a2e…

MALICIOUS

PDF

92.0 KB Created: 2021-06-26 04:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe8664606c3ba94af96b9840d335abf7 SHA-1: 2854ba2eaa9a15c03cbd0dc486209fc4b32a6220 SHA-256: c415071293449a2ea0c4f49c03fa22dcd9b0b7afbbedf5b8897c4fe4cb705acd
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links likely lead to further malicious content or phishing pages, aiming to deceive the user into clicking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c132252c1f6---56712423240.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a9264f8db77---53466779747.pdf
    • http://norilskgu.ru/userfiles/file/vuwutevasuwuxokogasafix.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608f19c9cba67---bodojetinaku.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/7fb98fbe4458884549e724cfcf821740/92393260028.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/1c40b90e3c98ef71d69f6e8f20e8d933/rozakapagar.pdf
    • http://songhandiban.com/uploadfile/file/2021062414462673499.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f3aa5c5b3---34692754999.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608059a7e70c9---74957996885.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/fd292556846700c88e2bfaf2a993513e/37601714150.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160b87c5d21f3e---fufixodatabomulitigadu.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d37776a2bd3---90493716140.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecb1d69057---rizakinukemamezuvigexu.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/68d3a8cec0572574f2d5b0c1dc13b1a9/79002364279.pdf
    • https://fzclicks.com/demo/files/editor/file/74599074184.pdf
    • http://lphs-the60s.com/clients/5/5a/5a84a5cabe7f31a06b4bf99f7e1b7ad6/File/21869935432.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/36d5hfcp5jof8jin9lb40sguh6/32279964757.pdf
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/fipufurekube.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d85540b934---rogomifibibopanodi.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/abcb63a342674caa4dd33a9fb31b1f87/50620379972.pdf
    • http://dinskayarealty.ru/media/file/19993585074.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/f30cc168242d5f77a7f3cb7cfc26422f/53903903247.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac70f2695dd---waverojitowivovox.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ba5c44c27---jibaluxosavapuwejiz.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/a9af680856332ce469a9bc2bcde1093e/pulezigivasibu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=most+awarded+tv+series
    • 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_off000106bd.bin
0563a008e411b30b74b473c251f431a2ddb3eb6aa749d650d9d568d28c0e2823
pdf-font-stream PDF embedded font (sfnt) at offset 0x106BD 17124 bytes
font_01_sfnt_off0001338e.bin
cdfe59d5aee39d9ceab4336012971b32fb629eaf92d078d36bf9ce70998acbf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1338E 10236 bytes
font_02_sfnt_off00014ac7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AC7 16792 bytes