Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bcc267e4203d6f4…

MALICIOUS

PDF

69.0 KB Created: 2021-02-19 03:14:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1c4dcdfd54aeed0b8b8226f80238e265 SHA-1: 5507db0ad54df0bbcba7e266cfb59fb513af7322 SHA-256: 6bcc267e4203d6f4b85095003dbe12966e6a3d300227440ab3ceadc1524442a7
136 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic indicates an image lure pointing to a redirector, likely for a free-download phishing scheme. The embedded URLs, such as 'https://seumenha.ru/123?utm_term=chicken+soup+for+the+soul+puppy+food+reviews', are suspicious and likely lead to malicious content or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/123?utm_term=chicken+soup+for+the+soul+puppy+food+reviews PDF link annotation
    • http://portkamesto.site/kubernetes_interview_questionsgxlih.pdfIn PDF document text
    • http://vipadminler.org/fifty_shades_of_grey_online_legendadxtlzn.pdfIn PDF document text
    • http://ita-women.space/1_to_1_minecraft_earth_server_ipvh58x.pdfIn PDF document text
    • http://axecheat5.xyz/westinghouse_40_inch_tv_problems566w0.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxarufodir/PPggfFW/85049042404.pdfIn PDF document text
    • https://cdn.sqhk.co/dojerilu/geighhr/shotgun_sound_ringtone_free_download.pdfIn PDF document text
    • http://yesitalia.fun/signing_naturally_ebookimxc8.pdfIn PDF document text
    • http://aarbuz.space/toefl_structure_exercisealiot.pdfIn PDF document text
    • http://seplafond.xyz/jakajeso592o1.pdfIn PDF document text
    • http://merishwheelrecords.com/gowajakukizepujorqhx0.pdfIn PDF document text
    • http://hookup753.fun/corporals_course_leadership_1_answerszj6xf.pdfIn PDF document text
    • http://olymptrade.buzz/9813508675442wrm.pdfIn PDF document text
    • http://reweder.site/wormax._io_mod_apk_free_download7ienx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/paropabaru/gevekebipupekelika.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/11792363046.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/lilik.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/jafolarekapododafobuse.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/account_management_resume_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/cisco_cwms_upgrade_guide.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE29 5256 bytes
SHA-256: 131de09a3906ee3b1762c32d2a1c6286ca2c7c9ba917f5ea52f60e9f9f036151
font_01_sfnt_off0000e021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE021 11360 bytes
SHA-256: 0fce8de008cc60381a0b78d983ac9ddffe8351faed62eb9bb9bccd9ca2afb5b8