Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c390e208063bb1…

MALICIOUS

PDF

79.5 KB Created: 2021-08-10 05:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bed02193b1499ee86b2127f2ddb27f7e SHA-1: 35b5ad301b868d3b8d3b9dec5eb236edb9905b5c SHA-256: 69c390e208063bb1d82759e0c5fb315c27db1dbfbe4727bf8963b8a692fff14c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of embedded URLs and the overall structure point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://garglob.ru/uplcv?utm_term=terjemah+kitab+tarbiyatul+aulad+pdf PDF link annotation
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/f3c2fd13018027a37fdc6c4b26975beb/48921868793.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/s6tc7jf26l8188s6kh0bkf1us6/dolirogo.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/22818568328.pdfIn PDF document text
    • https://o-dance.com/upload/files/kuman.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610a710a45a5a---82496436324.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160933f29554ca---86630271409.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fea88c36b---nabikevekosarosajiwoj.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/82266488714.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/92154324014.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/movafeg.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/4c4d144ec0c7424432546724e36115ed/xosumonemibi.pdfIn PDF document text
    • http://ovodatar.hu/userfiles/file/sopakukewixoleneposige.pdfIn PDF document text
    • http://scan3dsaigon.com/upload/files/29309730250.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/29274967118.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/vibamadunenimikonugogaba.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbac237469---vivekakolizemakiw.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec1a1c12e7---2237974266.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/6707410656.pdfIn PDF document text
    • https://trvstore.com/userfiles/file/87170469106.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/lekasotapaxolerasab.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/fitiwalepebubebetoxuze.pdfIn PDF document text
    • http://industrialdevices.in/uploads/98883615419.pdfIn PDF document text
    • 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_off0000d2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B0 17228 bytes
SHA-256: c1cbe4904722beda1d304e1b4fca63f686e2a0ad52f264ac49e819656321367c
font_01_sfnt_off0000ff17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF17 10908 bytes
SHA-256: 597f1390079d6985b8c2d284388d5c2ef8ca21d98a94955069ad5d8d98faf9ff
font_02_sfnt_off00011815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11815 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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