Malicious PDF — malware analysis report

Static analysis result for SHA-256 63fc2d74397ba36c…

MALICIOUS

PDF

172.9 KB Created: 2021-09-05 02:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c0a012434b906a3a946335f5f7bb939b SHA-1: 2096f2a0221c0f8ac318dc67df2418e43cd752f0 SHA-256: 63fc2d74397ba36c56c75bdbf0f729d17b8e328f0ffbde52e1ba06bf39e96e98
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains a link farm pointing to compromised WordPress upload storage, suggesting it's part of a phishing campaign. The 'SE_CALLBACK_LURE' heuristic confirms the document's intent to trick users into calling a phone number, consistent with callback phishing or tech support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/nu1ke7f90t8c1f7csq6eeg4js0/raluvalubirizadodogunir.pdf In PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/dpfe61ecp1fa3m11ge82c8o81g/sonaxagizupoj.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/3588511872.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/tetik.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5ed5bc3b8---8908374597.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8b825ba93---tigewuk.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/wafumobivoferem.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/6f208841b78ef31911234f6d60ec55f1/40878793212.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/18685148980.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/75591d72ec989a5c0893146cbba074a9/18516010962.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/91491022814.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/a298be416893e286df1a8e8c7d232a79/fovumim.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/24255097599.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/9814237e7c70b50b0a9896bbdf8e8c5a/50601633994.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/jetiniwomitorubufawijude.pdfIn PDF document text
    • http://drlalashow.com/php/billboard/uploads/file/48144446528.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79c5920a19---lufeki.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5da28ae9b---libiwubaxo.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/24697312113.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/65305448354.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/lowiki.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d4021533e---pisisorekidodob.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/nuvenaporekejexubowig.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16086c605d2a97---45181410901.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16103c3a2523d8---xuxorudadumaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=hermeneutica+avan%C3%A7ada+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23D18 10800 bytes
SHA-256: 5502a527907ff1ec8ffe8925cdb87d9f65d7931cdc4c027d1aab3dc09350bc36
font_01_sfnt_off0002559b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2559B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00026dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26DAD 20772 bytes
SHA-256: 03831a6f86cd36209c3d6f37baa5d3580ede59783db6fde1d78b1248796be532

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