Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c8d5dc4725e644…

MALICIOUS

PDF

83.7 KB Created: 2021-08-21 23:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 132e47dec4dcbc820e170fb660fb9f3e SHA-1: 91f6c5fc3ead98331b4bcd1b297b90b50d8cc2b9 SHA-256: 60c8d5dc4725e644309314086ca48342779d54c9926a6d33dfaafc435904568c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 https://wastran.ru/uplcv?utm_term=mod+para+minecraft+pe+pokemon+go PDF link annotation
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16089a4cda162a---jitajajojejolixefikireme.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52ba5de822---83574085671.pdfIn PDF document text
    • https://kocarbon.vn/luutru/files/gogimiroxaxede.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/zemixogufujo.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/70096677213.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/emg1fgq3uu2dj4rj0ohtujvcnr/765814221.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/7de4e3359d8bcd2a404d64c9895b7c7f/27591159217.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/31454454571.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/movibeki.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b08ee8ed25---sapefut.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/veken.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/207f6343776b99cbf6e5cf3eb957d49f/devamodubuxax.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/fikejusamatiwaj.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/bupabavibatisajitunufumi.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85703112648.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/fafagamos.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/16101382979.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/c4dd7e192b9f8abd46c4b679e960beec/jutolomefokapekigijatuv.pdfIn PDF document text
    • https://ayurmitra.com/files/file/jakejikulokugexipow.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/90197913280.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/sisanukamisoti.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/83665858261.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/94480892574.pdfIn PDF document text
    • http://didula.ru/img/file/zabamijeg.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/47290483251.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_off0000dfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE8 18520 bytes
SHA-256: eb9b6ed14403a64d0ec148883573a2cb414440cfbd8cf56fced3e4efc2be3379
font_01_sfnt_off00010d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125AD 10832 bytes
SHA-256: a7d824fa6bfae8b8979656c1aeddb085963fb160dc532d7e02726079f1dcff4c

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