Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f562dbc193fd179…

MALICIOUS

PDF

84.2 KB Created: 2021-09-14 08:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f1f11aa91cbbe9834d5c576bc4e22c94 SHA-1: 92eae56cf050ecdd8c066fb165f650dc7748b0cb SHA-256: 2f562dbc193fd17920e49f78df5e00ba802140ede34cbd8547f7884ae2334f67
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, some pointing to IP addresses and compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further payloads. The presence of embedded JavaScript suggests an attempt to execute malicious code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://everbeenmagnet.com/js/upfiles/files/disodopu.pdf In PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/4ff4cc969b5a5e50acc810491fb8ddad/47162818257.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f7ec4ee7e---83585021996.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/bozaxuwozimetasi.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/tomunopijas.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/22010318815.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/18158947698.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210903013619.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/gaporibila.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1a746ca7a---xolekekuladamufatobo.pdfIn PDF document text
    • http://galettedesrois.eu/userfiles/file/jedaw.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/79188427408.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/64071623775.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202109050732363015.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/91376070574.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/15670930281.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea1e629b27---lupanojexifiza.pdfPDF link annotation
    • http://tetobox-budapest.hu/uploads/files/retafifevibufolo.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/iq1k7ktnoggsd4k7jh4g9j1svv/leziminuvopozenulibet.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee9d119b0d---17786500267.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/23485647267.pdfIn PDF document text
    • http://dworbieland.pl/userfiles/file/safabosusukipudoxo.pdfIn PDF document text
    • http://oilspecchem.com/files/livawimivinorifixipobi.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/92507696930.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/55453453666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=dream+league+2017+free+downloadPDF 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_off0000e127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE127 10868 bytes
SHA-256: c77f600622a20ec842d24f407f89d0c228c52b445527d593e15bb34597844bba
font_01_sfnt_off0000fa3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3D 18884 bytes
SHA-256: a321a4435d0430a1bbf8b011e868ba4f3ca34407adfacb2aceee523fbbf05ec4
font_02_sfnt_off00012b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1