Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ac62d8e0752ade0…

MALICIOUS

PDF

80.4 KB Created: 2021-09-06 05:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9dceda76614a312626a1651a38a74ae6 SHA-1: 1a0768e349057b5ed5c31d1e455d1a72162bf87f SHA-256: 8ac62d8e0752ade0368ba6cb79459da1e675aba701bd8cfaac42ec60fc214cf6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to numerous websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting an attempt to distribute malicious content or phish for credentials. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lapenya.cat/imgjovesnaves/file/sovenojefunawakawulage.pdf In PDF document text
    • http://elesi.eu/fichiers/files/87054036929.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160983802ed64d---34715249437.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/7113nplihplu2ngee458eh94ea/78589095047.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c18da16d047---58907522615.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/bezovexatawoj.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/61812818088.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/davisadefo.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161106a84c7a9a---42473780223.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/83050705118.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/ditapakirazuwisofe.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/jepavulobitawenubis.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/160726c8d719ee---50663087550.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-3/20210503124823304519.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/bapujixoxoluwagasumoge.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/waxof.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/eb11481809fa178c1bd4e0101b4c88d8/labesafid.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608120b2dc12c---348570222.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d67892ede4a---watizasuduguwakuvuw.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/12092967828.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/27324198446.pdfIn PDF document text
    • https://info-jimukyoku.jp/lot/upload/files/fujekovofe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=prepositions+in+questions+exercises+pdfPDF 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_off0000d5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 17676 bytes
SHA-256: 8ea89ae7f428a6fa0ebff4611a1c66622b1ddacdb437d0d8fdc9e1f381a8c7b3
font_02_sfnt_off00011bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD5 10752 bytes
SHA-256: bd49154ad7cebe1116c0f00d09434d9b9cd33fa3d987eed128303ad48f27d492

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