Malicious PDF — malware analysis report

Static analysis result for SHA-256 69aedcdb4456b60c…

MALICIOUS

PDF

72.3 KB Created: 2021-09-09 02:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: a3ec85604d288594c9363ac58f589a0d SHA-1: c963e7b78e24fff3703264ee30df69b7f8e3e1b3 SHA-256: 69aedcdb4456b60cf3f3921e97194960c989ca3b1b129e900b32334b20d7722a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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://sakesushimn.com/userfiles/files/wofovabujob.pdf In PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/7928124798.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/xaderonefaxoki.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/5efca883d3db717ab7d4e7f8cae4f0f7/96998158800.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/28235787347.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/bupufetu.pdfIn PDF document text
    • http://altronic.pl/!mag2011/userfiles/file/8828008002.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/65228191589.pdfIn PDF document text
    • http://sarljarry.com/userfiles/file/mamikutimifo.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/27242663423.pdfIn PDF document text
    • http://duz-drustvo.si/uporabnik/file/zebef.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/rujejedapodolimut.pdfIn PDF document text
    • https://stop-remont.ru/ckfinder/userfiles/files/navatiledetosopere.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/gojivejegi.pdfIn PDF document text
    • https://www.serwkom.pl/plugins/ckfinder/userfiles/files/9748920551.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/61844189904.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/acbe899c1964b3c517852ddf0d20d222/43782212610.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/tosopozewozelal.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/tulobixonoxogitipamuw.pdfIn PDF document text
    • http://abworder.com/uploads/files/sijudepaxofola.pdfIn PDF document text
    • https://phu-komplex.pl/pliki/file/nebedosokata.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/66521241942.pdfIn PDF document text
    • http://harlit.com/upfiles/file/55407561361In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=most+downloaded+android+apps+of+all+timePDF 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_off0000b7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B1 10736 bytes
SHA-256: 60b1d6f2f4b0af5ba238cb61c7f7ff94be14d78883d5fb7f9c8f8a4ad6f7ba9f
font_01_sfnt_off0000d06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87D 16768 bytes
SHA-256: 9a441c9c638fd71961aa5088c84795ab0d629e1f9ec18ce49a40e9351a53aa21