Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e035c314b4e5a34…

MALICIOUS

PDF

138.3 KB Created: 2021-06-25 22:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c82ccd870464a9e50cff87b7975f50d SHA-1: 54c846422a02c86a96656a3cf290f600584f4735 SHA-256: 0e035c314b4e5a34e592fda13fb0deb743966c9fa715f30b8ce4c4f577bf677e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 https://synerhu.ru/uplcv?utm_term=clinical+chemistry+laboratory+manual+pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/911e50c2e80bc2386bd19d58d4ed1a14/95640258298.pdf
    • https://peterdegendt.be/file/31476798565.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3834dd002d---55060478199.pdf
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/kuritukilu.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755a444b3fc---pabikeposulazetimedida.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/0f4f7ffe05d9b6db39717f0e18ccc10e/97030243078.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a7179e1b1fcb0612db15ef6fd3cb3e1f/50693456744.pdf
    • http://cnex.cc/images/blog//file/nuvafusipufovo.pdf
    • http://pune-india.info/userfiles/file/13734592229.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f28557efd8---zotavop.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/9j62t7bn4jvju855125i4ot968/94788807160.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d1dd3ad1e---3929598072.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607476668664f---bisigiwenabitokoni.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829966d15c0---rixubiripo.pdf
    • http://ottotech.center/userfiles/file/gawavutod.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073572a5f725---30234866478.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/naeoccf77greo3modprl09aaob/talojibezedukavujenozokiz.pdf
    • http://prime-standard.com/piceditor/file/63561830682.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9413ec8d---likikurasumovosu.pdf
    • http://brlairport.com/images/file/zuropogitasujuvik.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd95a967b5---59623704784.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/k1obhv8mefhcli5ig5pktitq4h/3616127420.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c45d78c829---21957200931.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/6472db1e842723d1ef1055dc06f5c597/pedigasiguzisujawimovo.pdf
    • 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_off0001b957.bin
5e9408809835b5085c8c44402ef94b556a0cc17ab1559193264fe8c67725ff77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B957 11268 bytes
font_01_sfnt_off0001d363.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D363 16792 bytes
font_02_sfnt_off0001eb75.bin
c3e3858917cc4abdd614ec46563fa7930b56ba675edc6c5dac319448dc6a02d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB75 18292 bytes

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