Malicious PDF — malware analysis report

Static analysis result for SHA-256 965d326667c4498c…

MALICIOUS

PDF

76.7 KB Created: 2021-09-07 10:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 09aafd3700790a4c995cbb451931cb5d SHA-1: 29b617ca4faea8092bb91adb9008a48d82854d49 SHA-256: 965d326667c4498cc2d70015b54e57527d1290fc5a1253eafc93d1135820552d
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads, suggesting a phishing or malware distribution scheme. The presence of numerous unknown URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://interreg-ipa-husrb.com/downloads/79126409203.pdf In PDF document text
    • https://emauto.lv/index/images/up/file/61572301103.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/66454840794.pdfIn PDF document text
    • http://apcmagon.com/userfiles/6049467637.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/5e3f4ea00e1926f469c379613dd8f958/dufob.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/34486068372.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/59678010631.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/bevilunofinela.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c0480c4ca---woliruzaxagetaxaw.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a84199e621a---67191563147.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/80719095316.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/13872076781.pdfIn PDF document text
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/regawirudiv.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/bosobisixe.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/87742888124.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1626097121.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/d5799d18f2363f06a5094b9b956aa4ab/jisijebamegumejoxeso.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a411bd9f---32789301606.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/fbbec4396f2f46c58577bfd6c41bbe5a/kokegeji.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/22045966308.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/76497806414.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/45766869010.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/49713785676.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=cystic+fibrosis+mutation+worksheet+answersPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 17588 bytes
SHA-256: b8e53658683a2473f8d2028bf80a70e7e5dbb2bea6fc5fb7183ebb88f711e5e0
font_02_sfnt_off00010b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B24 11120 bytes
SHA-256: 08fc3eb81a842afb88010106c19e9cd90ffdb73fbdb24090b7f5b288649b0dd1

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