Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2614a73133af66…

MALICIOUS

PDF

84.1 KB Created: 2021-09-09 17:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6d33ad1f5c5d5107a7882286a480848e SHA-1: dc747807d74cec564456ab95086b126e8565ae22 SHA-256: 5e2614a73133af667886037cb0bc2c61d7d205b7fcac0c240e77d36b01a687b8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The primary attack pattern involves directing users to potentially malicious external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/mamvc816pd5ehqn9ovaimrmbmk/90895147868.pdf In PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/sanixomulunove.pdfIn PDF document text
    • https://at-studio.tw/app/webroot/userfiles/files/20210904_100306.pdfIn PDF document text
    • https://gangnampools.com/contents/files/pasasupetogutuk.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/fizowinux.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/fugovetunajutegulumo.pdfIn PDF document text
    • http://fkhd.cz/data/img/levovulu.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///26556080856.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/21068174598.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/boludet.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/98818453736.pdfIn PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/21449948579.pdfIn PDF document text
    • http://mclarenquartz.in/ci/userfiles/files/43082732381.pdfIn PDF document text
    • https://krygina40.ru/UserFiles/File/suguke.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/fabelevi.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/ropusawotukupukef.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/votuziluzulebanevuz.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/70204990206.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/zulawotoxamonodejizukib.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/zukogoratonegajokipujozur.pdfIn PDF document text
    • https://marmetal.cevhertemizlik.com/userfiles/files/75349272353.pdfIn PDF document text
    • http://xsteelstock.com/d/files/fubud.pdfIn PDF document text
    • http://indyskischool.com/ckfinder/userfiles/files/99338997944.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/jibomavevodo.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///26194473645.pdfIn PDF document text
    • https://pesonabali.dswip.com/ci/userfiles/files/lodaranenesanowi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=apps+like+thoptv+for+web+seriesPDF 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_off0000e4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F9 10552 bytes
SHA-256: c2e862a1a6970c1a5b0f410e89bea8bbff733a6326cf7a53ac2c9f4a90f308df
font_01_sfnt_off0000fd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0D 17656 bytes
SHA-256: 8ff5cfb1e83be72090104315edaa80fae8b1f4cfeec3da8c904147be58d70f78
font_02_sfnt_off00012aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1