Malicious PDF — malware analysis report

Static analysis result for SHA-256 8deda8d22ba2e18c…

MALICIOUS

PDF

93.9 KB Created: 2021-07-30 05:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d875238329d652ad9f78b1a71296b885 SHA-1: e55cb017a8a8d94e87cb8d927397c32c2fc6c9c3 SHA-256: 8deda8d22ba2e18cb35e9002a870643db1f8b049c99552dac35f39c44d45dcd0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms, with several pointing to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL findings suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=medal+of+honor+allied+assault+no+cd+patch PDF link annotation
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/linc68pftoaiqabv4gerq966lg/2112234519.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d1dec7550e5---tijalugoxan.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/f95b25c81011e4bd3e0652831d3d2ae7/25094168741.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/14237598243.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/74jmg4umk4pi56u1h3pisvppin/liwemax.pdfIn PDF document text
    • https://www.twibiotech.com/plugin/ce1/ckfinder/userfiles/files/wukotixoguzodidi.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/419b0932a70afb47db0fdb7703c3a3f9/nefexobivixifoderon.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/52334pmc1b0esgurgc4ecuef7s/sififabuzaxata.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/8h15vct98vn871h4o8rdt0c2oa/85598515502.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/3sb5nskrfi5br18mugpvfrm1nh/pupivikovukaju.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/kulemidoboga.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/87120535492.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bdc763973---tanolosesapu.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607127489e107---rasafedinuxuzewoderap.pdfIn PDF document text
    • https://hanomanberjaya.com/contents//files/52252961963.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/bapesibegifid.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf84ce40c90---39244486254.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/7be495b8db20c9039d596b8269727ef8/74181083815.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/a8sg88rj7siamdqnnvupa10l03/88646642079.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888aa6c9d2a---32570753784.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944dcc381ba---51294022574.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ecd25f10f---79177913494.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/71499163112.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/zipuperuxalazagive.pdfIn PDF document text
    • http://gyobel.itpublic/file/66797921482.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F2 10812 bytes
SHA-256: ab2b604883d90eb701a4414bb452d8d97c773487b7de9a6fcc560d6f61e71654
font_02_sfnt_off00012dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCD 23236 bytes
SHA-256: 860d7e16025becdac5560ca8e959a336578540472314737896ab457ff112eb59

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