Malicious PDF — malware analysis report

Static analysis result for SHA-256 5985b338dc676859…

MALICIOUS

PDF

72.7 KB Created: 2021-05-23 00:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e742e32c32207ba6b46788826232ceb SHA-1: a512354e20ca42f35f4c4908d9023324113eb591 SHA-256: 5985b338dc676859d1de35675c0d719a07fb80fcc0836223e26e1bda1af28b50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The document body, though heavily obfuscated, appears to be a lure related to infrared thermometers, likely to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://www.allatpatikapecs.hu/images/file/wuwubezavoxagagevazij.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/hp5hf2i0ecdefp7264qqq6li34/9108824749.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080d693bdf90---78780644461.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/99d85a4300738c664422cd1753b63749/80372814215.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609211d7c48ce---71595157047.pdf
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072207b7d02f---57883320684.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e7f0a48c0---poxudawogo.pdf
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/294s1j2a0pu64rd0m6usm8l28r/15895117359.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607307227f3be---68012009184.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/drfp2sok818p67blf4a8c1ora3/gewemirabimoxagugobineno.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866f885d791---47791253158.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/9d3669f6a18b34e664998703b241142a/79482209665.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bdad8d281---39143886804.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/a40fa034bd1f6b0e4ab26a39a7b441e7/sijomopilolosozifa.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c60e6647d---52241621620.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+the+most+accurate+infrared+thermometer
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df40.bin
3f874c2dcf9854c30b59e4938f7b130a077acc262493f9f9815fd25d6c5d1867		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF40 5244 bytes
font_01_sfnt_off0000f0f4.bin
1065109a5751c914985209ebfd47cbc10846b9187f6a9401c3906775e321c07f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F4 10688 bytes

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