Malicious PDF — malware analysis report

Static analysis result for SHA-256 1178ad683e9428c4…

MALICIOUS

PDF

167.0 KB Created: 2021-06-28 04:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 51587dd578d343e019dd6ab865c03a03 SHA-1: d70d05b9e7a2005af96c6522ea81c44bedb1d89d SHA-256: 1178ad683e9428c4314239111af2222d29f96c7949ba8e66459e6c214a2994ce
196 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as containing an advance-fee scam lure, indicating a phishing or fraud attempt. It also contains numerous links to external PDF files hosted on various websites, many of which appear to be compromised or disposable. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/qlpkafjm8d5204jcnkfaqjge46/dajegunaride.pdf
    • http://yesilderecine.com/admin/editor_resim/file/rirabifusanamubaz.pdf
    • http://omgmediatank.com/userfiles/files/zewunekafasa.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaaf80046c---sanufowalagapopenunixe.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/qj288ofabmno8q710adi378hlf/rekelunujibala.pdf
    • http://hit-air.pro/ckfinder/userfiles/files/xevarilifawijezek.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/5sgkcdg4gppsmvjus0i8epas9l/dugufisidurunaxidix.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/vfb7t6m6tpcq48tll2cpustudr/rasomomamufisumapeluk.pdf
    • http://limoride.net/gallery/file/rivafaf.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/rc0jf12n5vndbu9ntcpc1sndas/fijetakiwurokapupirebera.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3661a9fe7---dodix.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/2240980c8f3f1ec8995d6a90098d1158/bemefi.pdf
    • http://batiment-tunisie.com/userfiles/file/42590998976.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/be0094d8e3d008cf6043192e431b465f/83643667282.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/td0562259ibisqf12d93v35jc2/bexaxupavoxeramowovoz.pdf
    • https://betalinktech.com/blmedia/file/65921433467.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/342a1cc06e82217c702c84104a8856dd/85133195967.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076220f831fd---woviraxinomel.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/75d021b6364e36148c4c039a286237d2/49496976158.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1b096e0fd---24901056020.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098ecf69b9b9---degejezoso.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=research+questions+about+mother+tongue
    • 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_off00022ebb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x22EBB 16792 bytes
font_01_sfnt_off000246cd.bin
d9885b851587067b5d33ea39525295fde98acf5586d34697a5c5f7907a89957a
pdf-font-stream PDF embedded font (sfnt) at offset 0x246CD 17780 bytes
font_02_sfnt_off00027542.bin
2622702876e4cb1c3abc5b1a6c6716a20c5a989a8073bf89ffbde5b54335f957
pdf-font-stream PDF embedded font (sfnt) at offset 0x27542 11064 bytes