Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0ea6eea98b21af…

MALICIOUS

PDF

86.1 KB Created: 2021-08-28 22:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 041832845b949afd8b6e5480adc1a1b4 SHA-1: 5217b010c86863ca044ad8f8fce2ceb8b7f49838 SHA-256: 3e0ea6eea98b21af213c011c33929e84924bc38fe67d5a99642501efd20612b1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://zonweringbelgie.eu/ckfinder/userfiles/files/wuzuvaruv.pdf
    • https://xo-sound.ru/userfiles/file/buborigojakowujipivan.pdf
    • http://soles2walk.cz/data/file/53636648967.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/9d703cfb8caac9ed5f03507365f2abcb/buzanipuwa.pdf
    • http://jhroseclassof77.com/clients/45984/File/zesepenerojawi.pdf
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/18430417336.pdf
    • http://agcslohian.com/userfiles/file/virarifigaz.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd44be7ae4---xuwalezikidorimabuporot.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5ffe5f997---59940948089.pdf
    • http://gachmenminhchien.com/media/ftp/file/41054860300.pdf
    • https://kede.org/userfiles/file/siwepe.pdf
    • http://ahxxzx.com/userfiles/202105/file/simazosomosukonapofe.pdf
    • https://semut73.com/contents//files/goganugujomidodawikubine.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/3f53a11fd6c7fe43d08a9ed7dcc11945/rulaxagasasawekife.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986eeaddb38---wifulaxerukari.pdf
    • https://themalc.org/files/file/deweved.pdf
    • https://underworldgear.com/upload/users/files/dokevusafipewapuso.pdf
    • http://smsgurugram.com/miet/assets/files/22840157475.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/191052d34972163ea6058e8b4292a43d/61992727610.pdf
    • https://pnp-studio.com/fckeditorfiles/file/70558457708.pdf
    • http://vertracapital.com/uploads/files/94559886565.pdf
    • http://softwarefactory.nl/images/file/51779146634.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16072fbd011492---rovizepejerela.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161135cdcde611---42706511405.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/8e0l5tfj0u49bfjrkk7ic1obq4/tarujawurejijotopuwezut.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=wii+backup+manager+linux
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebc2.bin
933924f7012e827454b5ed20415efbe01478d3195afb2b0eff81cdab6ef387f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC2 17600 bytes
font_01_sfnt_off00011a04.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A04 16792 bytes
font_02_sfnt_off0001321b.bin
0049fa94ad0a3d7f3c10cd5a1a68de53a814aece81c2bd6270aeb3395039506e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1321B 10756 bytes