Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0cf91b81674eed0…

MALICIOUS

PDF

86.6 KB Created: 2021-07-21 07:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0d147dcc9fd954131c485fa273939f34 SHA-1: 153135accf04c76a02ebcc1324bb7f47bd66f61b SHA-256: b0cf91b81674eed066c710011afbe393e40489118bc1f362f6df7dad9e7c4017
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://synthecinter.com/userfiles/files/lesimitegibisaz.pdf In PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/nipunume.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/59834777434.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/1ad061891d74864aad1075320f5f02c4/73203592553.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/c2e95db0a9cbf29db85af260bec8071d/8332534014.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160f021d1b245d---65972191660.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///tonosepafivitidi.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/davaxotofonazodejos.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/60ea2be7c3da5e36537c1a8f47fc6eba/18693338846.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/56701744961.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/34q75521hb3hka9hljice74n69/57111242933.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/fe2a3b864e9a0cdeb08c0b200e553c59/20716577592.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160872cc1cacde---jezakodijenewerewonavo.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/92998596355.pdfIn PDF document text
    • https://arabacioyunlar.com/calisma2/files/uploads/97308629346.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/89209474414.pdfIn PDF document text
    • https://aashianarealty.com/file/repuwofoperasevukaximer.pdfIn PDF document text
    • http://moon-villa123.com/CKEdit/upload/files/vadeziwilulujab.pdfIn PDF document text
    • https://angkalaris.com/contents//files/noviwu.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/2256904d43bacd5ee59f0e1d37e14cf3/27133703144.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/towatezuzufiwekemen.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/74cafeef021bc86c3081a97a623b68c8/65834283082.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/valuvemokoralobusoz.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078417a49994---58326418038.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+does+cash+app+stock+buying+workPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 16828 bytes
SHA-256: 181ec2899fec39e906ea80772cf32b4fe19435918a5fe9869ccc1860c55779fe
font_01_sfnt_off00011989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11989 11268 bytes
SHA-256: a313dd3de4b6270e292f027a4dc84085170725a01acff171beef8832303430fb
font_02_sfnt_off00013390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13390 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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