Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2eda80f3c210f0c…

MALICIOUS

PDF

72.0 KB Created: 2021-09-14 01:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 92a52734416f056ccf57aa23123d1f4e SHA-1: 01fe36ff70e6c5e4bbba9b1cf3b6fd3f5587a907 SHA-256: f2eda80f3c210f0c056416638f81aae785ea8219e382e399fd9b1c1a43e6ea6f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external URLs, many of which point to compromised CMS upload directories or are part of a link farm hosted on disposable domains. The primary function appears to be redirecting users to potentially malicious external sites, consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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=human+psychology+books+pdf+in+marathi PDF link annotation
    • https://washlounge.in/ckfinder/userfiles/files/56532953588.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/gagorefofi.pdfIn PDF document text
    • https://flomogroup.com/upload/files/bokowiped.pdfIn PDF document text
    • https://fuoriscena.eu/file/51486438711.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/76252264935.pdfIn PDF document text
    • http://hladonural.ru/upload_picture/xufidipegavoxegida.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/duzoxumogedenufox.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/21584607691.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/8693579621.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/91518809012.pdfIn PDF document text
    • http://montesantangelo.it/files/files/62832985636.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210914040931_1415569248.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab3fe17519---bijoxorubur.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/10597449257.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613798e0c3fc8---36715971917.pdfIn PDF document text
    • http://yuha.be/_files/file/romusoxenexilazetovime.pdfIn PDF document text
    • http://phubozena.pl/userfiles/file/banuruzuwemajawi.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/84360698051.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/wufaragog.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/doselozugatarami.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/30461265610.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b0b90f0b6---55496718059.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB142 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_01_sfnt_off0000b93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB93A 15140 bytes
SHA-256: 72be29f530960f9fa1776ba4b52f8c4e0f0ac2d4ef67458488f117d126a88f60
font_02_sfnt_off0000dfa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0000f7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B8 11372 bytes
SHA-256: 280f5f3e6a3275ad64032ba14d3976d4b308250a5e749ac5dc2768b79f606097

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