Malicious PDF — malware analysis report

Static analysis result for SHA-256 501e660d7e97b9ac…

MALICIOUS

PDF

84.3 KB Created: 2021-08-12 17:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 279f82a591809325a01611127c215087 SHA-1: 3e17f50c9910d90a19561e2147f2b5f6c84b2bfd SHA-256: 501e660d7e97b9ac38ec454e039ede4eac66363df969a54f3759c26b0e79c999
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 that point to compromised WordPress sites and other domains, likely to distribute further malicious content or manipulate search engine results. No scripts were extracted, but the presence of multiple external links suggests a redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a031c8d89---48464947390.pdf In PDF document text
    • http://santehnika34.ru/images/file/29652563442.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/7d5e4b6f9d5e094928f4f3eaf64708ad/76032223773.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/ql7422trbaebk56fjauekse366/zasuv.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/napukixawipulavule.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607a78fbe9a5b---50698837236.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/e5d80f8ec4d29ae89139cb8be93ad98b/11830922930.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/jumaxatipafamenijerifawu.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/xufexibuvojar.pdfIn PDF document text
    • http://sobsai.com/ckfinder/userfiles/files/nobigute.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/45495753533.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/10051828027.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20727309471.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/70584655498.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/0d5208a09f96d1b9bc279f983984597f/zenajibutukupomamaluj.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/zavir.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/f4ef51a39135fd5dba838cb548b11da7/55902198288.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/vexekoru.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/mosisogonidifumonemepir.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c52243024---gavajosirun.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/34365660287.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d31ce7b3159---pomixupiki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=mary+did+you+know+chords+guitarPDF 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_off0000e385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE385 17568 bytes
SHA-256: 616aa7a90d2f6cab680835e30d0340610dc28e1051ae60bb88d0132cf1a8dbc2
font_01_sfnt_off00011231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11231 10856 bytes
SHA-256: 719b19990d6db0f792e5daf96f37cef1ea32542c36e1e7f500d10714c92b5bf6
font_02_sfnt_off00012b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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