Malicious PDF — malware analysis report

Static analysis result for SHA-256 d941197b93799ecb…

MALICIOUS

PDF

80.6 KB Created: 2021-08-17 04:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 019ba26837b54176f506766d1057b229 SHA-1: 065a06b60eac1248bf94fc3ca37af541cac64d22 SHA-256: d941197b93799ecb122264c56bc5bf29257f6a372e4f1b71ac5c455b14dc9f3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm to distribute phishing content or further malware. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://oniceh.ru/uplcv?utm_term=diagrama+de+fusibles+jetta+a4+en+espa%C3%A3%C2%B1ola PDF link annotation
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/5bbbb5def18a014a939040e4273e7621/69467288738.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/gepalisijatewog.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072f7bcc8684---40968204539.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/63606951060.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/bfcdf83cc4ecc203fc04fa7213d8c772/30414121672.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/l96su0nu4p0nir1cm7htjeheb6/34472534431.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/fedubuxijej.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/99010727160.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7b42b89eb8e1d91c830c72f8e599c51b/fabazumopijipux.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/e95qe3poujd62bqrrfoofahsjo/zadulafizu.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/aee2793af1714fc4bb7b924e81c7ef6e/fuwigopoge.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/d997451ef6e8e5d25111d2eb9e8cfeb1/56050093111.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/43552426260.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/62495349811.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/wonemofukomezazase.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b64b8300003---gidinifirerojajetisomuza.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/94067537643.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792df211892---54099375874.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/p6idi3ko4p5j857ton5p954ccv/39924190897.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/5654615072.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/44342077414.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160db54ed34c23---xekazeseligijalit.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

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_off0000d251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD251 18388 bytes
SHA-256: 297a1fe864a6058ec365e1be55f4f78a082e62a130b61a0e3e5c139feaeee54a
font_01_sfnt_off0000fff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001180a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180A 11624 bytes
SHA-256: e3140e7f89411a4a10b387a7b3f699bf2c4daca3cf5e9738abb39947ff8c21fc

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