Malicious PDF — malware analysis report

Static analysis result for SHA-256 80866ff5de8bc2d2…

MALICIOUS

PDF

79.1 KB Created: 2021-09-08 06:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 904350ad89d5d9ea9d33bc2b2b622580 SHA-1: 384d0e61b7f6fbe8ac9fe12bdd778b7b62bbc00c SHA-256: 80866ff5de8bc2d26ced93c9ed0778fa0a810c8eb20094e52df426ed933a4b42
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable domains. These links are likely intended to lure users into downloading further malware or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/df8b194db551d8cb0ded830fc71c1d17/30986037384.pdf In PDF document text
    • http://186086.com/upload/files/25862361431.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/45848193232.pdfIn PDF document text
    • http://omg.su/upload/File/89327761745.pdfIn PDF document text
    • https://biocoils.com/img/file/33046543496.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/telulefupikaxasipagefo.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/22273582438.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/dobomagewanodusogeseg.pdfIn PDF document text
    • http://hasanmasat.com/ckfinder/userfiles/files/88404744623.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/midebamu.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c91fa88f1---ponimi.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161298f0754b3d---motofogozolikixawopiboziz.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a896127bd---dewumiluvigazu.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/a8fd6eaf142da2428a7115cc5374c55b/42288722959.pdfIn PDF document text
    • https://cape-electronics.com/media/file/17201718475.pdfIn PDF document text
    • https://ibshospitals.com/userfiles/file/kifunododekagedezofitaw.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/18542617103.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e4b17c6ab---xurifa.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113b3e7aad5f---44759298640.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/xoriruroxinesobawopibawuw.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/54339040720.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/14265710265.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/mupawu.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7b2be1219---66660924231.pdfIn PDF document text
    • http://apogeeconsultancy.com/upload/files/sadararavesuzudux.pdfIn PDF document text
    • https://cahayaapi1.com/contents//files/vitiruverofometupino.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=buku+ulumul+qur%27an+lengkap+pdfPDF 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_off0000d2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 16120 bytes
SHA-256: 60deb21b34161c9bb1287ffb02243daaa42b4bacbe281351d3041dcb55c2bfbb
font_02_sfnt_off00011468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11468 10788 bytes
SHA-256: a762f77b9ded0b3d6a661b6e08bbf5f5cffc3d5e784395187410e7906aff4e08