Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c926b308d72fbbb…

MALICIOUS

PDF

84.5 KB Created: 2021-08-12 12:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 168ac3b99bdff1a420ab93b130de34b2 SHA-1: bb9930699c12401333038826e64784ce5e1db395 SHA-256: 3c926b308d72fbbbc8582374e0408328e98a2d62b12bf43b3921e3c064e5409f
216 Risk Score

Malware Insights

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

This PDF document exhibits strong indicators of malicious intent, including a high ML classifier score and ClamAV detection as a phishing trojan. The document functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting, consistent with a payment redirection lure. While no scripts were explicitly extracted, the presence of numerous embedded URLs and the 'Payment redirection / bank-detail change lure' heuristic suggest the document is designed to trick users into compromising financial information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://krisoc.ru/uplcv?utm_term=how+to+transfer+whatsapp+data+from+android+to+ios PDF link annotation
    • http://angelescare.com/userfiles/file/45601816752.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/pimuzudejuxavobokavijag.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160982c09a10b5---69336179213.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/fufurinotukonerijov.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/46970555470.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/4e055dec6337f78ab30eae8cb582a00f/xufasikigojamafovumusori.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85727115142.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/75787197075.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/tonuwofopi.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/91315398266.pdfIn PDF document text
    • https://t2sc.me/userfiles/sejoxekowanokolebewowe.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0640192b48---58010310423.pdfIn PDF document text
    • http://sieuthikhoacaocap.vn/upload/files/44271311734.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/1464a3b4dcfde9823e947edd8ee8ebbc/45812852541.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/vojitebisa.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/051a066c4c3e3a96a6258cb435399ecc/winafixa.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/48663c6bfb30dedface5efac0798d851/petad.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160aa048b1a202---ripafa.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/dilawemusinusijurixewul.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/fupozazaxavumezugif.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/vapuwutabuxipareradufetel.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_off0000e458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE458 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6F 10792 bytes
SHA-256: 9b481531a8cfcf791d21002dc42e38ee9c467c16923ee8f7678519f7850ec4b7
font_02_sfnt_off00011517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11517 17464 bytes
SHA-256: 0ed4db9e767f3038fb2922eab9b7e3a8c05a36562749e458edeed5195fa803ab

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