Malicious PDF — malware analysis report

Static analysis result for SHA-256 84306d0fe7388432…

MALICIOUS

PDF

74.3 KB Created: 2021-08-30 00:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 737d04a102dd18ef288cfbfdb3e77b35 SHA-1: de813d49f504e6c9e68ecd78c7911395ade4f4d2 SHA-256: 84306d0fe73884324b40b52f6f766c30955e5af683627357d197727024b95c74
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting sites, likely intended to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/eba5b45efe442fdcde1585653916d4ad/65198020384.pdf In PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/9b7501aa297ae86543fd87f63e8833bc/25860473451.pdfIn PDF document text
    • https://eberli-medical-supply.ch/upload/file/69092768619.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/30461a6256dae8c88f71ba3388f265b1/47283659479.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/49724128851.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-6/file/66158208793.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/54470956004.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/bovixewowapezowozus.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071275a0c97e---rugowojelobinaza.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606df89531d2e---tedudigidafolonubapu.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b273cbc10db---fefunom.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/47704919577.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/vemevufexurudeziseninator.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/ligegejadefatu.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1625871573.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/99978191058.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/9b889f1854fb2aa08ffaf8bfa2f5c096/85861828868.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/81296693551.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/ig9g3osh3gn0nutgoq63c54ss5/58645175329.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/8jt09bc21nb9215opr5t1dsnh5/wasoraweliponowigad.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/s573bgpqr5i3amnkns656n9il7/6782097856.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb6380b648---kemadopipusa.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d2fdbfdaa9e---75065495822.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d2a61cd34---fakowefax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=which+of+the+following+is+a+highly+polar+moleculePDF 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_off0000c3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A8 11220 bytes
SHA-256: 7a1bc7341c0917e16e7490e00fc914032f360c08f3115667eeffe848e40e9695
font_01_sfnt_off0000ddd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD7 14628 bytes
SHA-256: e208522c521e0c338adc69b97783cd65ebf5306e4f7b64555616a155fc1bd2b2
font_02_sfnt_off00010226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10226 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1