Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e0beb5171c4986…

MALICIOUS

PDF

70.5 KB Created: 2021-09-26 11:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f32ca65c0f63ff1521b21cb56cb61f63 SHA-1: 3f20e0b747409f75d9e4df1e2cb010332a22cc96 SHA-256: 42e0beb5171c4986f7355b9f56175174c2167534133622fcdaf295c3a6723ad1
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 flagged as part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/5cead8337f4371d489a7d644dbd8306e/vuvezuwo.pdf In PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/xatuvogeluvanilej.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/ad130d0b6eb1bf7a96f0351237aeee0f/26014514997.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/43663833738.pdfIn PDF document text
    • http://erex.hu/upload/file/wanuralajotilekoje.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/25221844657.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/95924141845.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/13110454045.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/86012834993.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/91413592648.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/17840571578.pdfIn PDF document text
    • http://boden.boj.se/uploads/userfiles/files/25722415970.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/98566210301.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/7584907103.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/tawelid.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/nixizewilepemopur.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/15518925584.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/66694655825.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/67156815357.pdfIn PDF document text
    • http://griesvoegwerken.nl/UserFiles/file/xatanar.pdfIn PDF document text
    • http://matras-devison.ru/upload/file/kufabopoxe.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/5269277559.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/wolage.pdfIn PDF document text
    • http://ty-int.com/files/files/85511390947.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/49611403358.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/pewudesazobedomatekotufo.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/zovexapaxaberusuwulimav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=hill+climb+racing+2+hack+unlimited+coins+and+gemsPDF 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_off0000b226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB226 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3D 11260 bytes
SHA-256: ee83c77e3b67efd33474e6c7a4e29bc464a6c47b5965edac01f55b4e56cbb998
font_02_sfnt_off0000e440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE440 15612 bytes
SHA-256: 0727d6ca9e6e155f9c02ea3558be1a8794351f3b75878a3e8cb996967441dd2d