Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cac8d7ca45c6c63…

MALICIOUS

PDF

119.9 KB Created: 2021-07-31 11:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: b4abeadec72e500001c2580231026846 SHA-1: a2dfb6a0f53773c799adce48f6ff038ff24ea684 SHA-256: 7cac8d7ca45c6c634bca61fb6a641c3c9c42dfc4a90f71dc375c6cf41fcb7d90
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, for being malicious and containing a payment redirection lure. The document's structure and embedded URLs suggest it is part of a phishing campaign designed to trick users into changing payment details. No scripts were extracted, but the presence of numerous links to compromised WordPress sites and disposable hosting indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098cc4a63edc---24105820721.pdf In PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/mubewalezonatuk.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075b94c13743---pexaguvelivowoko.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/39001345994.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/4f314800acf056d63ea27bb91ab11e07/gusitebetabosewabojopi.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/40268382231.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/2679620e3030869572b09ea4f368b614/88625492246.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/a7050dbd27d70803bbe5e4e225ec538d/jowavegovoni.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/59184766736.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9928d59bb---jujibozeweditepo.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/76f144ec65f1824da3598103c2bd8817/28378904554.pdfIn PDF document text
    • https://atl-50.com/files/file/masiseluxunafowefu.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4837d818c---48551387708.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/8275923947.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/zosawaxigegisunubukal.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///86156140978.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/b00ac25778d990cbee9a8ad99140fa61/36464354984.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/f95090c81f401753d7b85f497899f19b/58663055072.pdfIn PDF document text
    • https://paperland.bg/uploads/file/ligubejarenajafukaku.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/46bce249de1ff1d5c6e8ad4e306b4fde/ganupajijikak.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/befef1020219383449d80d12a0598d78/nivesuwezifisixij.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3dbfb08f4---butotuxapijapava.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=windows+10+cannot+create+ad-hoc+networkPDF link annotation
    • 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_off00017205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17205 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A17 17792 bytes
SHA-256: 35793cc62478a7ba617219b177e9fe8e25347f332b5ed53b4e3d9da1b4cd839a
font_02_sfnt_off0001b804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B804 10800 bytes
SHA-256: 9e7d3b51bc743129524d57572296aa382b493244529ef4b3ef4279d83afc3916

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