Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a60deecaccdf064…

MALICIOUS

PDF

97.4 KB Created: 2021-09-02 22:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e9233383359a86a70bfb5ebd4e7d884d SHA-1: 1eea3a83066e719252937fedaef39b7bdff568ea SHA-256: 5a60deecaccdf064d5b4610ecd31b47deafa22f8864293fa5c226f9e7e10d4e1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many hosted on compromised or disposable domains, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The embedded JavaScript could be used to further obfuscate the malicious redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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 https://pixomot.ru/uplcv?utm_term=sony+a6500+manual+exposure PDF link annotation
    • http://labotinnghia.com/img/files/toginujatatojafufibidi.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/topekesokakanis.pdfIn PDF document text
    • http://lighthouseofworship.com/clients/44803/File/zezidomefukudemalujefud.pdfIn PDF document text
    • https://renetravel.ro/images/files/35014755380.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/qb01a62jicq9fum9pr8ipkcg01/42623737596.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab4422c35c---jawagebakop.pdfIn PDF document text
    • http://parkwaywest1974.com/clients/861606/File/51332748273.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/38334708690.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ee6d5b936---pebikapuxepufiga.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/vuwirifolasu.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c3712d976e4---vuxetujaradiwuzuvemusofap.pdfIn PDF document text
    • http://rainesclassof1980.com/clients/3/31/314d3ac3c31ee16cfc8f78d457af0ebc/File/karabimow.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/b0b6f492120ec896db1e639b8fd51ba8/87537829070.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/58213993987.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/19066490975.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/vikok.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094086e0b05a---10544497525.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/10782097134.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/225b723f96afc47700e262158b4fdce3/xavap.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/f60b16800a48d6726777dae28b6a66ab/xesebipelonexapimuvo.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/58209880211.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b99510d7a68---xugutopabas.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_off000115cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CB 18524 bytes
SHA-256: 97149ec1207c183f1909a6274ebd2ee91e2f226ef54a70398849570906f13525
font_01_sfnt_off0001463e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1463E 11040 bytes
SHA-256: 662763b52b16ee611bc6b4870bb9c9879fa53dfc59368d88e02be27e76e759a9
font_02_sfnt_off00015fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1