Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0a49a80c81c3a1…

MALICIOUS

PDF

80.7 KB Created: 2021-08-22 02:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 85c00977255f412541d72c52131b5a1f SHA-1: 0160bafe20c6aa1532ef12c70c0efc67388bf711 SHA-256: 1e0a49a80c81c3a129dc53b845b6c6b52a16f7d15166ebdba06d8d57b06b1b94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm that directs users to multiple websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns suggest an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16119ecd6cba36---mulujufuduxutexof.pdf In PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8f8e129f---44070023727.pdfIn PDF document text
    • http://ustunongel.com/image/files/puxijizigaxamekaru.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/tekisag.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/dofajexise.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202108170233303581.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/52168525485.pdfIn PDF document text
    • http://tv-kitchen.ru/files/files/luxivisumazawaverozoj.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609c888bc5571---xuwuwuwawajalazan.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/a05111c745299c46ad5dea0553942664/wivokuba.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/46221543147.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/12209408466.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/a5ce31912b572b8a4595b76c8743d600/wejozokis.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/47563101181.pdfIn PDF document text
    • http://luatsugiadinhviet.com/upload/ck/files/43212860313.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/31643700195.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3ede59d55---sekuvazezekipifif.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/d112c716d7b01f23371c7b82df3bbe66/gasupopunixokek.pdfIn PDF document text
    • http://steps4cancer.org/clients/a/a7/a78c374070a178914b502abaf3db82b8/File/tenodi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5dd6183bd---63883814048.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/tafidupagomeberesorakurav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+tape+kinesiology+tapePDF 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_off0000d7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000effd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 10612 bytes
SHA-256: a5815be3c1bf0b5a1051dcaa8a47061b5249e2b3f2dde92e159f0d9b4c5445ae
font_02_sfnt_off0001086f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086F 16920 bytes
SHA-256: fbcd3ee49c051d851e3685cf04570b1ae686118285039b0fede8618d750a9018

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