Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a465af6d17ca08…

MALICIOUS

PDF

93.5 KB Created: 2021-07-13 22:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c3233f2b237a1a7deb4f5bb8aa13eb5 SHA-1: 12cade2656da241727d9e14ec7db258a49f29e3b SHA-256: 45a465af6d17ca080a0a3d685a38e247dab99e404c4c02cd643353d1d925cf12
196 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's content is intended to defraud users through fake lottery or prize schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://crysiq.ru/uplcv?utm_term=my+grandmother+died+without+a+will
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/046250a5511c33e13bc7bbb43319f973/tadogusuna.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a244ca5e5ce---12446938458.pdf
    • http://51-lq.com/userfiles/file///43596641367.pdf
    • http://musikpark-live.de/userfiles/file/15355698496.pdf
    • http://adirondackseafood.com/ckfinder/userfiles/files/vufino.pdf
    • https://allcreaturesinc.com/files/files/35625123041.pdf
    • http://joyearland.com/ckfinder/userfiles/files/70908054188.pdf
    • http://konemara.hu/userfiles/file/xozazagagebenakudaduku.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94e460d7e8---1626135105.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f75976ea13---topujaboxajukazukidat.pdf
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/7868226099.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e415268f89---mugomofotidagesimesaf.pdf
    • https://amthanhanhsangchinhhang.vn/upload/files/makinuvafuje.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41c83182e9---lomokebifuxetusufejogado.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/pobopakawaborizeweneva.pdf
    • https://cmsschoolkg.org/userfiles/file/zirekipusatetuzenisuba.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/875aa5f187de8a2ba97ca09cadc34fcf/99579745363.pdf
    • https://himalayanthailand.com/image/upload/File/zabosogupow.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56445a831d---gopukanexabete.pdf
    • https://hostessima.pl/userfiles/file/57418390957.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16082ca200b205---7980072977.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3e4fa49f8---gadilotun.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/4b910f572c0a65cacc402676746f3b22/76585205493.pdf
    • http://obasekiestates.com/UserFiles/file/51018146195.pdf
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/14572736543.pdf
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/xavipilopezabekixaxe.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_off00010a5a.bin
8449ffe2965673a1a011e8d1bdcf00fb2e22f86ca683a51d1dcf3a6c7f4ad277
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5A 10820 bytes
font_01_sfnt_off000122ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x122EC 16792 bytes
font_02_sfnt_off00013afe.bin
533a5cb3db0f16b8e7f5fede8b48c7291d57d6b93c0b84df5d213750cc0fe58f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFE 17372 bytes