Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e418f8759b82a56…

MALICIOUS

PDF

78.9 KB Created: 2021-09-15 15:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c11dc4ffc3ad136a863f4ec7ee03510d SHA-1: a07686e9d3a0b9e41d85cffe5e8a30b819ef07c6 SHA-256: 9e418f8759b82a5603b23fa5db4bd4c0de2c83851eba8752f008f7d497354915
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs and link farm structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://oniceh.ru/uplcv?utm_term=how+to+pay+nfc PDF link annotation
    • http://awkontrakt.pl/ckfinder/userfiles/files/diresegujebezumeziwum.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/15760046404.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/42381555719.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/18753622474.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c571114e8---xajara.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612eced98a132---mabalofasupesaraweto.pdfIn PDF document text
    • http://fteq.ru/files/file/41848290840.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140f32b4cc64---83227662123.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/56746043384.pdfIn PDF document text
    • http://kayapalinakliyat.net/file/5499024439.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/86785858035.pdfIn PDF document text
    • http://canoto.us/Images_upload/files/nuluvowigovuwutegu.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/40074600606.pdfIn PDF document text
    • https://hidropomp2008.com/uploads/userfiles/file/26487725666.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/fakenejumijudi.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/56619218009.pdfIn PDF document text
    • http://veitali.com/upload/files/tumudojuzod.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/5429439709.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/sekujibekadogij.pdfIn PDF document text
    • http://medeeatour.ro/mm/file/jesasowule.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131596d74b0a---vizoxikip.pdfIn PDF document text
    • http://hkacca.com/userfiles/lemutiloforedubowuna.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/molorirofufoj.pdfIn PDF document text
    • https://reniuved.it/file/99285418438.pdfIn PDF document text
    • 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_off0000d1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C2 10128 bytes
SHA-256: b31b3d4895e8783311401f7eea2054e0e9268adf58fed400721fda2a6b469625
font_02_sfnt_off00010091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 17476 bytes
SHA-256: f395517f04879a8b25fc0c55bbf1984cac1657b7cb8ff9db15d7b73e6e734488