Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbea1aec64c3691d…

MALICIOUS

PDF

78.3 KB Created: 2021-06-28 00:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f3bad7238aa5da0d4e53e9e76a94a1ce SHA-1: 84fe521e6d6fec178e408b9fd67bac4e7495b242 SHA-256: dbea1aec64c3691d7714194d0a50a6e681bbf873ae7cb78ac281a9a27201ba06
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which are hosted on compromised CMS platforms or disposable domains. The heuristic firings indicate a link farm designed to direct users to potentially malicious content, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the nature of the links and the ClamAV detection suggest a malicious intent to exploit users through these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://catamma.ru/uplcv?utm_term=mother+a+houseplant+boutique PDF link annotation
    • https://flyags.com/editorResources/file///43707946237.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/94242455340.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/22638511729.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/64b60b77ce3b47bb7d481619c8bebf20/buvome.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160731796a944e---fozolurobida.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/fe0cb7d2cca00ef216650a6f47299542/gawesuzutibexisejimazu.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/0489d0df778ee25a96e7adfb9d2bb803/22399597832.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/fdd3de6ecbaf2118229938fb1da7c306/14746446501.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609835cd79a4b---nawezudogukikukose.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef1fa7aa31---lagekizezovavidenesokej.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080968e4040e---jimexasobop.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee76db86b6---fanozefekogabebajitasepov.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/30965603477.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/nulojigujepenadi.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bebe2556a04---pijunedexa.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/dogisorujofenika.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/9531614969.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/ruruvirarexogo.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/3vanmfp60uii18nnv3jh1bbs5c/61363347874.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c72f170f47c---jutilabeduwewevusivij.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160732d9935204---mugebapobipipozezarer.pdfIn PDF document text
    • http://penzion-u-zamku.cz/files/file/rojomevimokirekoj.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/juzekunuparekutorog.pdfIn PDF document text
    • http://renovator.cz/files/file/5831945730.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_off0000cde6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE6 10728 bytes
SHA-256: a376fcb6775c668fae5bc04170af9043693478560f7c1b9203f2055f3599769c
font_01_sfnt_off0000e644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE644 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE56 17412 bytes
SHA-256: 529c41e2a5e24d6a6e49bee74d1c31d20df58b1c17419e157462a962ad49c5b9

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