Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bac5d030574033e…

MALICIOUS

PDF

81.3 KB Created: 2021-09-13 18:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4f275aee0d982db47fecd26e9b7aa522 SHA-1: 40434d0b64b8637d947dd42bb5e34320d52f8fec SHA-256: 0bac5d030574033e6c3c0ece1022eec243df0490db148191e45575ee23a80106
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically a 'Payment redirection / bank-detail change' pattern. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to financial fraud or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://cructi.ru/uplcv?utm_term=super+mario+bros+nes+emulator PDF link annotation
    • http://appinaris.net/ckfinder/userfiles/publics/files/nifuwutitawezugavosopefeb.pdfIn PDF document text
    • http://pnalog.ru/images/file/zojutel.pdfIn PDF document text
    • http://sinners-party.de/media/file/rovavinelifo.pdfIn PDF document text
    • https://xcheck.vn/uploads/userfiles/file/38404433105.pdfIn PDF document text
    • http://ovstav.cz/app/webroot/files/files/lodotilub.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/gasekopatobakigoxorevagen.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddccb391b0---39864902157.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f861693f3---xivum.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/42319303174.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/9e2d32e2d1a434b5a552db8dbe6bf400/tigafivubibupijix.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/72891833125.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/11395439165.pdfIn PDF document text
    • http://liderzy.natura2000.pl/imgturysta/files/xawadijilemesegutigiwux.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/vulufirowubekekeveral.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/48212575206.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/detaxa.pdfIn PDF document text
    • http://teplospectr.ru/images/files/tidazixikelibozo.pdfIn PDF document text
    • http://hoachathoanggia.com/userfiles/file/piwirem.pdfIn PDF document text
    • http://energywork.pl/userfiles/file/mososonodudewekawewonobo.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/tetujoseseg.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/sipoxibabagaxafif.pdfIn PDF document text
    • http://prakseologia.eu/userfiles/file/64412869642.pdfIn PDF document text
    • https://slide-bearing.com/d/files/wadopelezixu.pdfIn PDF document text
    • 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_off0000d773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD773 18376 bytes
SHA-256: 21cacfae6edadc9d20aa289d10ecf6fe6868a2cef6dcaeac70947bc615322a18
font_01_sfnt_off0001076a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076A 10728 bytes
SHA-256: eaa2e26a9f11f2cd792a80c070754658dba962d9bbd3fdd9da23e1ecb71021f5
font_02_sfnt_off00011fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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