Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2ffaaf19637f64…

MALICIOUS

PDF

82.9 KB Created: 2021-09-05 21:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f970f193dae82f4be4ba0c32bb8ad307 SHA-1: 184022d9d8e334a6dbfa040ba67a022704cf14f7 SHA-256: 9e2ffaaf19637f64593235ed9376c4977c99534d6ae3df98649bbedf28cbde4a
176 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and using IP addresses, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple PDF_URI heuristics and the ML_NYX_PDF_MALICIOUS firing support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://al-farh-iq.com/upload/userfiles/file/60237254932.pdf In PDF document text
    • https://vildmarksjagt.dk/userfiles/file/vinojibuwedenoxulivo.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c99f58d214---xanezelafejawoni.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/dimexedewimemuk.pdfIn PDF document text
    • http://sghr.ca/upload/ckfinder/files/86275633015.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607daa42cd746---21601451938.pdfIn PDF document text
    • https://machinex-machines.com/UserFiles/File/porabizoveguserokakugako.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/r33c0o148vnl3u3oaqhpqsdtb5/95388668891.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/bokipikiwone.pdfIn PDF document text
    • http://stevis.cz/files/file/98260161375.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/derobexabew.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/c9331amfhul0f3nbu8sn24ds7p/66735880312.pdfIn PDF document text
    • http://chuaphucluong.com/uploads/image/files/bidopadivejubezafil.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb2f1e021b---xatewixi.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/aec606100ca3e8b95047276b3e90397d/sexoxubez.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160a90bb2db14b---doxiboludivaxebixo.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610577f444c69---fedimarisewuj.pdfPDF link annotation
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/gevane.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076852abd672---luzub.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/lotuforovexubex.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/xazetebevewapuwisifafov.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/354bca7af77786239f813c4974ae2f3e/tusosageku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=adobe+premiere+pro+cc+shortcut+keys+pdf+downloadPDF 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_off0000dd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD74 17876 bytes
SHA-256: 22d0e1f53137c554b0eeb1a172da03d0f8537163bb84d84c7998559b88eed444
font_01_sfnt_off00010b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B47 11396 bytes
SHA-256: 126c4195f88b93d08be74258e47a81a8e6c63f4d4e56eb96cf66601faf8989a4
font_02_sfnt_off000125dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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