Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dec2b4e465dab1a…

MALICIOUS

PDF

83.2 KB Created: 2021-09-04 18:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f4c22375b2093c53ce92ae19a2f5ccca SHA-1: 9234b281bf325120670d26ed989886e935ab04ca SHA-256: 0dec2b4e465dab1a4d09768f9ac66938bdbf3c50e64c8a078f4725cdf3fee8f9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. Heuristics identified multiple links pointing to compromised WordPress sites and a raw IP address, suggesting an attempt to redirect the user to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://allycatering.com/userfiles/66685654191.pdf In PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/c4cec4f49269fa3fb14aee2bc21a5fba/34551895011.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/44494ae12dfff03bbb39c0a71c150b0a/vobijizudo.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/q54b3runjifbp78je7q0pms6k3/murokokazirale.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/jic7c5cc7pg5pbk15fg2mrinbl/76014073275.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/0032e86f11e46fccc0114b0aa17e4d02/69610291047.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/kigatif.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/nekopozufinimi.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/94139086490.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/4054499835.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b1ec1830a---dirajala.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a565a66804b---84850278801.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/rowoz.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/a8b40fe48990ec17469ef416030ef025/doreruzisexomam.pdfIn PDF document text
    • http://www.fdconsult.qa/public/uploads/cms_files/7510988923.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c60eada27---xanurilorutakabukuz.pdfIn PDF document text
    • https://nitdgp.ac.in/uploads/userfiles/files/79450137203.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4907904e6---7519059425.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/24983433194.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/21q22eks1evvi4iavvrncv7ph3/xibumifol.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/fe2c95fb8dcde1bd691eff4a7a7c345b/danabufepabevibekizes.pdfIn PDF document text
    • https://sicurezzaips.it/uploads/file/givaraxuk.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606d09de1f621---gesaveruposusazotiwabadin.pdfPDF link annotation
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/e2h2vlccue14fn861m3nq14v09/38659572449.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/xiwezovazivunavevojoresam.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaf129f833---49469892639.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=bus+transport+business+plan+in+nigeria+pdfPDF 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_off0000e148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE148 17112 bytes
SHA-256: 76b846a2f6573bd1ac16818b65f035be624d332e77f3b01d70c4c48e3b182fe1
font_01_sfnt_off00010d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5C 10968 bytes
SHA-256: 22ff7e4d9ae4aefff9b3b50c6cbdf0db904e47ada1113f0bf5c9dfaad2c4c3b2
font_02_sfnt_off0001268a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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