Malicious PDF — malware analysis report

Static analysis result for SHA-256 d982005a4f1b064e…

MALICIOUS

PDF

88.2 KB Created: 2021-06-28 20:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 70673de12f0d057989a9a920b68965d5 SHA-1: 169e0c94763eee048e403405aed88c8e0673c82b SHA-256: d982005a4f1b064eb3386c4457d5f20647262ab1c62c1e06a6db03824ee0efe5
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links are likely designed to lure users into phishing scams or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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 https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/sb0gf05im4i7bamfu1eu9hu3m2/tisafupowa.pdf In PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb985654ac---30142476843.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/65932500962.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b02973e9216---runapurig.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/72f046b76453aa926d45f904bcc3c5f3/90763612925.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160c76e9370e24---2142311749.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/pli52ec25uhmtpavht2r7s28o5/zewoliminujuvuditu.pdfIn PDF document text
    • http://splogservice.ru/content/file/povelaxomiwexarowe.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/69774512195.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/defawodibatuvul.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160939fa3b1e92---9451672946.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/gec55u3q1kdbtukmcn9br1sii4/71270982856.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/lre1t3c7sgohqkqk3lomdo1vlq/fafasojopud.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/rivobevudam.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/fuzubasepolor.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/cbd61067be8c3894ad5aff12ada6b33d/77180482646.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/2m6q2ufpqt9a4s5no94jritt3q/91081924705.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/depovudalamejojijoki.pdfIn PDF document text
    • http://stolocatering.ca/clients/874514/File/dezinonemowirotusop.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/59995374753.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/92321668946.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085f709d7b76---zobezejitedepovedefawibu.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/06cb424318b4deaccb1c1af9509613d4/nopazujalerebusawadiruvur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=to+room+nineteen+pdf+downloadPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D8 1848 bytes
SHA-256: 497df1ef13f53dc4e101951212393354e5ecd45b963abd6e188780add67fbe3f
font_01_sfnt_off0000dd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5F 16592 bytes
SHA-256: fa1c929fa642cfcf0b0f43639b68849163276d5ac12b3a2745509c9e16db8afd
font_02_sfnt_off0000f436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF436 10540 bytes
SHA-256: c7dea1233da580cbb9b0969eac3ff375cd8c09628fe2377e74c11b0da0b8028a
font_03_sfnt_off00010c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001244f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244F 17080 bytes
SHA-256: 81ed61bdaf33b65681367e512a7c76122fde6b8681321bf7e36b51ce4f8557a8

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