Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab98dd918d19a15…

MALICIOUS

PDF

83.4 KB Created: 2021-07-09 10:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fc6d19299df1ad612c2379d9bbf5c01e SHA-1: 0745a4f0fc174d3001b39d95daf1cd9222b6ae5e SHA-256: bab98dd918d19a151d7113816a4445e26e03c7c6062be758f07047ed57f5352f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The 'SE_URGENCY_LURE' heuristic suggests the document content attempts to create a false sense of urgency to prompt user interaction with the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dansecyr.ca/pdf/file/fokeweliralikako.pdf In PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/88b536f3dbe642235be8c95e6ac9f653/60142972115.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/1af9c07c29b6829819a52414e3af6516/30355610291.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/48967655675.pdfIn PDF document text
    • http://goref.ru/files/file/ropotesafer.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/9tt343lg8cguhoqdohituc8l8j/lavuwun.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/fatajopekidof.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/kebesidupozorejutar.pdfIn PDF document text
    • https://go2germany.ru/files/file/wajofujefetupolawoxudiro.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098694272603---17036860999.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608cef3d1a85f---rebikado.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a197e360de7---rixupizexime.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/e07322a0d68181b3eb04d62768c91848/mazix.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/lawolufoleregave.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160b405bc6676a---mebob.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/fiwolisibeluworajorob.pdfIn PDF document text
    • https://areicon.com/images/file/43120951782.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/31525622359.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b13f839f4f0---84905365083.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/54939311818.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/90760033041.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afbf6429403---35863525679.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/45242006815.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd9d494ac7---nopinizonofilepoti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=cloud+computing+short+questions+and+answersPDF 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_off0000e0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DF 17340 bytes
SHA-256: 3df33befe14b80a8fcd8c2b3ad8ac847191a11a121ec804f3c868915aeed162d
font_01_sfnt_off00010e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001261b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261B 11324 bytes
SHA-256: 57c9cc101a121d0139648746047e4d891325306b4c617726a5dea30c256956c6