Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c076703d9781a0…

MALICIOUS

PDF

91.1 KB Created: 2021-08-09 07:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 337c9572a70c50b9265707355c87066c SHA-1: edc438330e8d4d8eb5005f1631f180ebe67d81bb SHA-256: d9c076703d9781a0df652aa72fdfe3cef801b6e97cb316799c136a59d6640876
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits PDF vulnerabilities. It functions as a link farm, containing numerous URLs pointing to various domains, some of which appear to be compromised WordPress sites. The primary purpose seems to be directing users to external content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://wastran.ru/uplcv?utm_term=female+bodybuilding+diet+plan+for+beginners PDF link annotation
    • https://joebalogh.ro/imagini_ws/46882278538.pdfIn PDF document text
    • http://topas.lt/userfiles/file/12631428541.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/3fe043ce6a0d9e7cf61e4eb033811aa9/65725094986.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/zixamutibodejufosiporemer.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c72b57e409---sesivelovejopi.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/silirurejixuleworinamag.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/5a711d4ea9c481fdf7934b61b73dbbf6/23148802651.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/6946903958.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077432940b3c---rozufamomijarelur.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/woparapute.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/ee8d41fb19e1622b4a31ba66857740d5/56883264901.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082b3e77ef54---7280881404.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/vasenezaxesezife.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/vuwuvovivisaliligano.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/ltusg4b8b54p4gt3amc2mbv1ej/nokugepepemav.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/pebokaxuzavo.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/66163422107.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/sexeliru.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/pixajupagemevuvovarijo.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/59899659815.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609465233ee59---merukutinusekobaw.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/tasenipolulakubomevezot.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160a881441133b---vujet.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160b62eda67ddb---duliwujajizoxum.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_off0000ffce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCE 16912 bytes
SHA-256: f153fc3fbc1bf6f187341d875d3ec3315954cdd11583bfc64b61cf5e35c0740f
font_01_sfnt_off00012bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC8 11172 bytes
SHA-256: b463e9158772eacfd884a661009ee647485395b3bff8f35038d0a41731397b34
font_02_sfnt_off00014570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14570 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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