Malicious PDF — malware analysis report

Static analysis result for SHA-256 8965d203558094b5…

MALICIOUS

PDF

228.3 KB Created: 2021-07-06 19:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9b95f2ac67c5b10dfadfe1f48ddd0c65 SHA-1: 914a0a79363fc4f2e1233d8078fbdf139ef3da35 SHA-256: 8965d203558094b516dda5f8b9e96323300933d8e2d4d2760f3330d07c3b047a
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by multiple engines, including ClamAV, and flagged by an ML classifier. It contains numerous links to compromised websites, suggesting a phishing or malware distribution attempt. The 'SE_CALLBACK_LURE' heuristic indicates a potential callback phishing or tech-support scam pattern, aiming to trick users into contacting malicious actors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/18gf8mljbg5cr9c4d4dvfaei64/81664034979.pdf In PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c68b3a087e---32814415877.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/86361100064.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/38151ce59757ca21cda2aa7a11f47418/79698212947.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/b0b196456c6e16d578ee909f429d56ca/punuruno.pdfIn PDF document text
    • https://sambelteri.com/contents//files/47966964383.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/87767776924.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c72ab9dcd39---tonulugajugidudigixom.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bf097d8e6---zeliwatij.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/5lcae56jru64lecbl5ar2mb0kf/48712680738.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/48ce2c85b89d4c69b68b30356392574e/28537931273.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608101cf0b563---93338984679.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/59951916558.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/59832602575.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/f59ee4f1b0ca98d47f2758583c64a997/79773684797.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c89e22125ed---30946064459.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6fc4e591f---22804725852.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/9320307494.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/8hqtsqrtnju8r9sevj0dcnl2a3/58894669553.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2cf124c1f---miresus.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/7993dcff1d21646bc54f917522648897/10445380212.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/bccb6af3f60829e557977ce1aafa61cf/43413193589.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/4ef53843ac781f5e76ec3b2cbefd2511/80294782205.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a11916d1611---pakivonatejovokazebiroleg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=freud+and+hypnosisPDF link annotation
    • https://mediaget.com/userfiles/files/74286054322.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_off0003218c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3218C 10536 bytes
SHA-256: 0476e99b611392287fdc986f10fb15a3f19fcf231ef96ce882309181f851150c
font_01_sfnt_off00033965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33965 20488 bytes
SHA-256: 74daf69044043a8b740c50aea4285b3d135be5df04328014dc25265acbc0309b
font_02_sfnt_off00036c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36C7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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