Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f52302ca1ae464…

MALICIOUS

PDF

82.9 KB Created: 2021-09-07 20:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b943ae52c0d72c1e1e92404dc96a675b SHA-1: 0ca6d02740c37964068505055cab43611bd296bd SHA-256: d8f52302ca1ae46434e7e62af7fa2e1361d3d9a43b12dfd715fd6bf75300d621
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a phishing lure, likely disguised as an 'internship report'. No scripts were extracted from this sample, but the overall structure and URL distribution strongly suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://ketchas.ru/uplcv?utm_term=internship+report+pdf PDF link annotation
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d116a3d14---kijowafo.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160987b31e8987---61943075112.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/pipakelorapamavij.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f33f0ec83---22483511196.pdfIn PDF document text
    • http://qca.ch/userfiles/file/33984847710.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/xedumit.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/25310916453.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/d140dbd30cb1e28dd0b1d84ee5651769/zegirutetujaxuxowusep.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/21552141298.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/fatobedanu.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/wineni.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/a06361effa3d332f32ac71bb8db10957/xukigorenofuse.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/g2n5jq9kfvg54398qvr9vsvb7v/38604335226.pdfIn PDF document text
    • http://mosjob.ru/images/file/sovumawupezalurunulusabi.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/51926199535.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c7a0d2cab---49581869217.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/6683403739.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120bce8bb415---56453685335.pdfIn PDF document text
    • http://dmscsmartlifeblog.com/userfiles/files/lesineludidubi.pdfIn PDF document text
    • http://autokolcsonzoszolnok.hu/admin/fck_upload/file/viwafutu.pdfIn PDF document text
    • http://www.520amis.com/upload/files/3472217162.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/22958360471.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080a0ce451d0---xisikukinesefofenetepegaj.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_off0000def0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF0 18408 bytes
SHA-256: 2ee6c0878eeff55ac1f2fab2622e0387c8ab220bdd24306a90609b2983027540
font_01_sfnt_off00010f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001272f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272F 10340 bytes
SHA-256: 055e5cc9bc0db23f98c6ba8268cff786de1d568b53d08463dcb1af62dea76c5a

Open this report in the interactive analyzer, or submit your own file for analysis.