Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c2fc4665fce070…

MALICIOUS

PDF

76.6 KB Created: 2021-06-26 09:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 78df4f8d9f430bed9fe024342987214c SHA-1: 7b84cca291a20850b4b54549faf423f0aa4cd107 SHA-256: e9c2fc4665fce07054cff0fa9acf70590d8169af9af047b3793113de987eb360
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is flagged as malicious by ML classifiers and ClamAV, exhibiting characteristics of a payment redirection lure. It contains numerous links to potentially compromised WordPress upload directories and disposable hosting, suggesting an attempt to host malicious content or facilitate phishing. The document body is heavily obfuscated, but the presence of PDF link farm heuristics and the 'Payment redirection / bank-detail change lure' heuristic strongly indicate a business email compromise (BEC) or financial fraud attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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 http://www.dean-cpa.com/files/adminpic/file/gamusemif.pdf
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/31280785341.pdf
    • https://egyiksem.hu/uploads/file/64591620848.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/fp5qfo3k1t12s5vo85f6njp76v/xuluwiwikowejekivagoxi.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160cb47d595552---158967326.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c34ab10334---guvumisok.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4b0de6e29---zidenorudubudirotib.pdf
    • http://baigeleather.com/userfiles/file/zakujozejugasikun.pdf
    • http://studiolegaletrotta.eu/userfiles/files/gosulanasinaf.pdf
    • http://colorfulmedia.de/fotki/fotki/file/rumumatavoxibuzosuf.pdf
    • https://smartcirclegroup.com/userfiles/file/29902422720.pdf
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/22736947064.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c081e6da1---vudewugovarumipiweboguj.pdf
    • https://invest.pl/userfiles/file/pukafasesipu.pdf
    • http://usmleworkout.com/files/file/putaduw.pdf
    • https://sharadsangam.org/UserFilesTwo/file/30193518569.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0766ded9e---kobetaworojerubeba.pdf
    • http://placc.info/up_image/jejajubipekozejejezalipav.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608d30dec9c8b---7360236426.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/19eslu90ufc1eo0e1s8vg1t3h2/29030570898.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed36e7b65b---73498535039.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075ac555b6bf---junomezipawunokasiruwem.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0ab784e6d---59503543886.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a5ccd65cd---52791583015.pdf
    • https://ekransamara.ru/files/dukavuwexurus.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=first+puc+accountancy+question+bank
    • 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_off0000c913.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC913 16792 bytes
font_01_sfnt_off0000e12a.bin
eddc290bf961b991005cb267e571979949f8973f4d41c2972a83a3a06d4f89b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE12A 10892 bytes
font_02_sfnt_off0000fa4c.bin
f4b1d719504e0efbd5f913490d053c15abd4326e65b398fef2c11117af2b7028
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4C 15892 bytes