Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac248eddbeea3eaf…

MALICIOUS

PDF

160.5 KB Created: 2021-07-06 23:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea84baeae573a0855c174142ceff5a82 SHA-1: 0ef896d109b96f3ad3e223d82822a4fe17f847fa SHA-256: ac248eddbeea3eaf484460ab93f1b303ea18910785c2c69508411cefba9bb580
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The document's structure and heuristic firings strongly indicate a lure for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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 http://cukierniabrzezinski.pl/www/artizam/fck/file/dizerofebalixabifapujis.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/4344a0ffabfd4bb553cec7f5287de886/81038847985.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160db429b9b777---19606341476.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/01345f9af29fa8f08b8f510d96087f54/wozivotebesiweka.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608230f4f163a---girelubuxojuparuxot.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5ff15842c---46254760360.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e160f7d03db---movirisesinevitat.pdf
    • https://laptopserwis.com/app/webroot/media/files/75547761239.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160761f9df3978---nabalular.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160cd242c800b1---penepuxigumesas.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/ff0e9dfd8fe7a512e189c3ac9a4cae5c/sidakowu.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/st20rpr8nemgmh88pd5helb9kl/vilusovijitalegezag.pdf
    • http://glamour-nsk.ru/ckfinder/userfiles/files/15270757769.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c83510e3b---98075328998.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808817b1e22---53743813489.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bbb52cb89---lokiberanupiv.pdf
    • https://actorconseil.com/files/file/52991310786.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609854f71b7bc---fidubolazelig.pdf
    • https://kaptenhoki.com/contents//files/21284697082.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/3ef22ec79b5f931bea19ebd668bd1256/tovonis.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2dfd8c978a---13968718191.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2fa2f279c---ruzav.pdf
    • http://travelshops.pl/userfiles/file/12246038839.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=packers+super+bowl
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c5cde1d87---22620491028.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_off000215c6.bin
5d50d4ad7d21bb269829a60f3ee7053e5593899b033f4395d9bea23b6a696011
pdf-font-stream PDF embedded font (sfnt) at offset 0x215C6 17756 bytes
font_01_sfnt_off000244d3.bin
b8c506dc97232b42d8f6595db11535ba6640348af3ac94afff6037f4e7a6ab9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x244D3 10492 bytes
font_02_sfnt_off00025cb4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x25CB4 16792 bytes