Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ccbd60efc7dbc58…

MALICIOUS

PDF

70.0 KB Created: 2021-09-01 02:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39cdf775e1326daa559fdcdff6b6e953 SHA-1: 03c8026310e29a69adef7df002cb03c36dd5a3c8 SHA-256: 6ccbd60efc7dbc58f58502d5bf5dee6926c7d5f420656f6a1fe6f5480372440c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of a screenshot designed to trick users into clicking embedded links. The numerous external URLs, many pointing to compromised CMS uploads or disposable hosting, suggest an attempt to distribute further malicious content or conduct phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://queure.ru/uplcv?utm_term=deonte+brown+alabama
    • http://pokorny-podlahy.cz/UserFiles/File/velob.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/18e7676ef9c7c0b0e860d11bdb744877/nifoxi.pdf
    • https://b2b-intelligence.it/uploads/file/vujufiwesamozojazejomas.pdf
    • http://czdashan.cn/uploadfile/file/2021052106222573499.pdf
    • http://partner-support.net/user_data/userfiles/files/rozetabil.pdf
    • http://mtntoproyalshihtzus.com/clients/4/42/42f4769cb4f2467af64fea76c5682520/File/vinuxopololurolaluvazefi.pdf
    • http://hanbangrd.com/userfiles/file/20210805102023_2136184495.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/d50b5093b72f6a8aac9addfb64478ce7/84196358329.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/f9a151ac1270ba54331c677b04a350ee/nasojomazexalar.pdf
    • http://prttour.ca/FileData/ckfinder/files/20210703_94B9AEF4B03A3FA3.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/98f8ddda766906fb2e7a34307faf3fbb/73899455313.pdf
    • https://shriramsteels.in/public/ckfinder/userfiles/files/30390147630.pdf
    • https://airshow-bg.com/file/69800519700.pdf
    • https://vestol.bg/files/file/76379073812.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4309d7a85---72387408925.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/075f10e834a73c3a2a1bf33cb3e3d5de/97395363664.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1f0ee945e---rariraluvajebeturo.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f038f152c14---8273025724.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed3b20fff6---86319378756.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c304586ba---59879300168.pdf
    • https://schmitz.cz/res/file/tafugurul.pdf
    • http://qkmedica.com/uploads/userfiles/file/mepubasanadam.pdf
    • https://euronuts2009.ge/files/files/bomixexuwimoxabofaze.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e092879600f---45924842699.pdf
    • http://rideco.hu/upload/file/roxozitovoximalugubopew.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F8 16792 bytes
font_01_sfnt_off0000d10f.bin
ee452fde5e6f52adb7cfd3fec926cf71ca452c56734bb43d52c631bc8fa6cf88
pdf-font-stream PDF embedded font (sfnt) at offset 0xD10F 10236 bytes
font_02_sfnt_off0000e813.bin
ed6789f6695072631aa65b47bce82d2f7dcfaa458813d7df4635fe6404ec6164
pdf-font-stream PDF embedded font (sfnt) at offset 0xE813 13928 bytes