Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9d203fe5596806…

MALICIOUS

PDF

97.0 KB Created: 2021-09-10 01:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6ea2cf0ffd48c803e6c01d361a83ca71 SHA-1: 360ff97174d4867b9e9162d5934a870f325af1d5 SHA-256: ac9d203fe5596806ad6be924655838e1d2325ceadc762a95621f03c7f376d4cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lead users to phishing pages or sites hosting further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/db241h9bpeo4e5jithrs2bk0n6/27014252581.pdf In PDF document text
    • https://businesslife.com/content/file/72304122244.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/bivutulivadoku.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/tamiwaro.pdfIn PDF document text
    • https://digireg.org/upload/87679379416.pdfIn PDF document text
    • http://haki.vn/uploads/files/88721763580.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/nekurefobemati.pdfIn PDF document text
    • http://8njl.com/userfiles/files/rawadomezobadapanonapu.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/39224209381.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/85102435626.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/46369941045.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/pugexoxozuwuzajir.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/47258756852.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/wonafibasisinoratemi.pdfIn PDF document text
    • http://riverhouse.at/pcms/content/file/49135057416.pdfIn PDF document text
    • http://fruitvita.com/files/files/jilewesepu.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613472c6b826d---besuwozamivagube.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/5ea13cdb0b70588d873596e8cea932b9/basojifodazededaf.pdfIn PDF document text
    • http://defhjdrjioo.friend-match.com/upload/files/bagujugivomuga.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/60355394364.pdfIn PDF document text
    • http://lagrupacio.cat/file/7388481558.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/67471249009.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/94077632538.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/fitewotilowigodiw.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/sabozetofaretoxit.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/11157462331.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=words+with+o+at+the+beginningPDF 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_off0001178d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178D 17772 bytes
SHA-256: f128df58bdfd05a63cc2d5b8522294b3d940117cf3606cdc5c6d22d6dd928210
font_01_sfnt_off000145b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145B8 10700 bytes
SHA-256: 104f84a7c2080b4efb62e7abfdaa6c0832398c0f62da802fb4aecd67a3fca433
font_02_sfnt_off00015e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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