Malicious PDF — malware analysis report

Static analysis result for SHA-256 24fbba51e3715607…

MALICIOUS

PDF

161.8 KB Created: 2021-07-12 17:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e780bf9b5bc819770ea0063d230e28b0 SHA-1: 7c4924b5a3a1253e48b4e97860deeeace88843fc SHA-256: 24fbba51e371560768f9fea5ef040c6e7b659662d1748345fe45e850fa4f92c7
276 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1071.001 Web Protocols

This PDF document exhibits multiple indicators of a phishing and advance-fee scam. Heuristics indicate it contains lures for lotteries, prizes, and parcel deliveries, as well as MFA harvesting. The document also contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The presence of these elements, combined with a high ML classifier score and ClamAV detection, strongly suggests a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://laborke.ru/uplcv?utm_term=outlander+project+free+tv
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/0nmhr5lfc1kpfc81dm3j9t5hvl/zakexasixadu.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48372cf2fe---radorawewatujuxisiz.pdf
    • http://promocode.lu/userfiles/files/71861758247.pdf
    • http://firewheels.pe/userfiles/file/lanar.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d36c2b273a7---davalorujusobeluvadekiso.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e2f24f0e---topokenujunetudibib.pdf
    • http://abogarestudio.com/userfiles/file/purenima.pdf
    • http://www.ecvbrass.ch/user/web/file/19539719487.pdf
    • http://hargrovefamilyreunions.com/clients/16272/File/1034528483.pdf
    • https://anfauglir.com/images/file/68344146036.pdf
    • https://faktxeber.ru/resimler/files/gajilasisutezifalulini.pdf
    • http://jaatkinson.com/userimages/wiveketalodozoladitudi.pdf
    • http://abwlanham.com/uploads/files/11691983608.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/7e8b033776861bc2eafe829d53accbe7/tugumosekigimogowavaguba.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/7edb4cc6fbf28613d0134081af0c345f/ranadadotin.pdf
    • http://alkanboya.com/files/file///zekadimutasazivazafurufi.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a590bdb7f1a---sewixaxanimigotivufajizik.pdf
    • https://nadinerogger.ch/userfiles/files/29210960157.pdf
    • http://madmojo.com/fckupload/file/motalopetosaxozefibitupug.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/58363602832.pdf
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/5dd096429eb576267d8ad103e6463bb6/25506561421.pdf
    • https://saleskerala.com/ckfinder/userfiles/files/1967408212.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/39vlqfkngqr0fg388b4im0b3ic/daxejeromif.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160876fe7df771---4311759216.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021952.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21952 16792 bytes
font_01_sfnt_off00023164.bin
97853f469596c527935cc6579d2eb6b5040843389abefce066b6f1cbed0eb636		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23164 18388 bytes
font_02_sfnt_off000260e8.bin
10225d99ca23a694446afb22dd9134f948f6ab89bfde0c693b88e409b2f784fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x260E8 10672 bytes

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