Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d425ce66bfe65e…

MALICIOUS

PDF

81.9 KB Created: 2021-09-15 09:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d8840e70820735f17835e77f5311c427 SHA-1: 2247219d181d41b6ea111a922e0714b3bf20eddd SHA-256: 62d425ce66bfe65e869bf31cafe5324a4b6fa79766c9506df579c3c6e36f1e95
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm pointing to multiple PDF files hosted on various domains, some of which appear to be compromised WordPress sites. The presence of external URIs and a link farm suggests an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://phuquiland.com/upload/files/tizopekimidobozamepap.pdf In PDF document text
    • https://leuphuotcamap.com/uploads/image/files/damoxemenidupamizorod.pdfIn PDF document text
    • http://dmkert.hu/files/file/pidawa.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/76546717518.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4b974fbe5---3472609187.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/72893616814.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fed98b0e2f---32911756322.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9ee6a7ff4---wujutopufoboperazevinuweg.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/61264907135.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/dubegogoborosado.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/koduwufopilorovejeguru.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/memegolotuso.pdfIn PDF document text
    • https://esz.jp/img/editor/files/tonusagapog.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/vuvurepaxifutakolefemuz.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/60935417606.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131617bbf5ec---tedupekupoxelorebibu.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/nogesusina.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/37878845711.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/kesoxuxubumapopa.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/6bl6ea53idm6nvfk198muga7pf/79628856670.pdfIn PDF document text
    • https://inunekocp.jp/mailmagazine/upload/files/kufasofafugugipowix.pdfIn PDF document text
    • http://getdol.com/page_data/file/boresopolazel.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/zimipesovulejofuripaf.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/db0c00773a1f31bd3c7b19ca895affdb/duzese.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/62490651175.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/sasafixujixebawuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=minecraft+pvp+serversPDF 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_off0000dee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F4 16712 bytes
SHA-256: a8b9ad3f28b8714f9fbf9e7910c1f8e0aeb534308f8ab19b4ee561f08e98c02b
font_02_sfnt_off0001225b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225B 10368 bytes
SHA-256: eb88ea5f2bbb3c04f86534ae1f7c4ec83805f83e063e5e4572eaa53670e06a8e

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