Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0b42dfd9ad601d…

MALICIOUS

PDF

84.4 KB Created: 2021-06-29 04:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 726b610f94fe835f692d416ac7aa0500 SHA-1: b70a07f0b8274d61b1af6e2caa9c7a3026ba6757 SHA-256: be0b42dfd9ad601d23f08acf9d3ae97dc3f57e8f54c6620d71de95f8ddaf164e
196 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious files. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is crafted to deceive users into believing they are receiving a prize or parcel, a common tactic in advance-fee fraud schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • 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=dance+with+dad+songs
    • http://hrzservices.com/uploadfiles/file/sikev.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/8638e756b3202056d190ad68b3e84399/dazuba.pdf
    • http://kinocosmik.ru/sadm_files/638906424.pdf
    • https://langumeistras.lt/i/File/86180606636.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/da4p7o8u1p5fcrbgtdpr3no4cr/50340812582.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160acf37f607bc---51026268133.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcf0e7bf05---womijomodaxutozalekuximum.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/31ce4dca4ba18a0a305ffa112c627973/21280943164.pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d243cc0dd6---53907049247.pdf
    • http://hoangle.vn/uploads/userfiles/file/puwevamakax.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9154828f9---roxijugitapenoxumepuso.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/0cc7cd779b9c8b63325e658ca6c50c9f/movikodo.pdf
    • http://seamacros.com/upload/file/74158102095.pdf
    • http://www.knickmeier.net/images/pageimg/file/gerejafetorafabomijobaw.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b378b6f8---20448051004.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/tasuredifejixovikipexete.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160930a99a8e68---vogolotusim.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e551e4811---lawelebulumiregodoremok.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c6358187b93---tomorelusotijijatatig.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/se5e4gd24dvmqb2bh8ueiqotvd/saserixutad.pdf
    • http://fqcycpa.com/jingkelun/userfiles/files/20210610013438.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5de9bf6e4---beritetotamolavowusakanun.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_off0000e953.bin
b3af372483db4ad95efb7cdb69e620193e6035844ab12c865ab144d33d1d760d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE953 10588 bytes
font_01_sfnt_off0001015b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1015B 16792 bytes
font_02_sfnt_off0001196d.bin
939e74a54f799b8617eeddbbcd23b995657fa349ebd1368747ea1fdc4b5ee1a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1196D 16764 bytes