Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2c8eb2638a46cf…

MALICIOUS

PDF

89.6 KB Created: 2021-07-16 16:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7a4f87f50f86bf5a1af153bfc71e75f0 SHA-1: 8c349749c285a603e2eaff2ae7528c1c39b91106 SHA-256: ed2c8eb2638a46cf127e56ba3d91ba746ee05b162ad44b82891392dba8247567
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links are likely intended to manipulate search engine rankings or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b523e856ca6---jekomezimobopikasaxukes.pdf In PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086ca223181e---87116085138.pdfIn PDF document text
    • http://moristas.com/userfiles/files/64838240356.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/78758620021.pdfIn PDF document text
    • http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/vozixikizujufi.pdfIn PDF document text
    • http://e-sportis.com/images/upload/xenamorobuteperuxemedur.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/3d3bb929648765465ab72ced3271673c/11514004122.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b939dc98edc---kusejajananijotiwurovav.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/84291488629.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/2563199573.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072032995719---kizosubavopoge.pdfIn PDF document text
    • http://agavietnam.com/img/files/divitanovamotituremip.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/xololemobuzewilapesajuf.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/pc16dljaudlt5vkg0p108qh3lb/61021945129.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/nuxigozejonobomemexibe.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/60301692714.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/731892013579467807fcf660c683079f/41539133225.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/rifezig.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/963e5057ef4a518ae6487eb9c6fe3a5b/70049576589.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/3566895766d637a535fc79678d23b02c/begowinifuvatuzuj.pdfIn PDF document text
    • https://puntoagricoltura.it/file/fugutonuteto.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/lixejigip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=classic+wow+rogue+pvp+bisPDF 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_off0000f9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F2 17736 bytes
SHA-256: 62a8f10573bf159a01e364789299782220de2b111ca35a1bd3433034ade1c588
font_01_sfnt_off0001287a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287A 10768 bytes
SHA-256: a2263c50fdffc89f90d987619f8b3fe6f38a5f2ef817aee357407f4ef75e1715
font_02_sfnt_off00014145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14145 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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