Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f6f511b6b662b3…

MALICIOUS

PDF

76.6 KB Created: 2021-05-03 00:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1167e6086311f30e3abdc0731100a404 SHA-1: 79053f4abcc861a670a5e60fae75a599eb0dd1dc SHA-256: 60f6f511b6b662b39744c2f85fd1fab72503e5e6ae4f9bd83c0e14c4178498af
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, many of which are hosted on disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The document body, though partially garbled, suggests a lure related to a book review, which is used to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=rese%25C3%25B1a+del+libro+el+arte+de+amargarse+la+vida PDF link annotation
    • http://healthyforczechrepublic.site/iba_guidelines_on_arbitrationh12gq.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/xapirewizo.pdfIn PDF document text
    • http://itravelgr.com/sp_racing_f3_flight_controller_pinoutoyqcs.pdfIn PDF document text
    • http://gixuloponij.mygamesonline.org/administrao_estratgica_e_vantagem_competitiva_download.pdfIn PDF document text
    • http://wildboost.club/wamapepepusizuwudibimavuf5h34y.pdfIn PDF document text
    • http://item-get.top/hd_radio_technologytrpqj.pdfIn PDF document text
    • https://pagopejej.weebly.com/uploads/1/3/5/3/135315805/480ded75a84.pdfIn PDF document text
    • http://jobauthor.online/what_are_the_advantages_and_disadvantages_of_new_technologyjq93i.pdfIn PDF document text
    • https://xuravamu.weebly.com/uploads/1/3/2/7/132740838/573831.pdfIn PDF document text
    • http://geekcods.com/80596995208hglxi.pdfIn PDF document text
    • http://hookup756.fun/troubleshooting_chamberlain_whisper_drive_plush155g.pdfIn PDF document text
    • http://mestorating.ru/vivabnor3f.pdfIn PDF document text
    • http://glasshookahcatering.com/50561407550q1z5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/77584943689.pdfIn PDF document text
    • http://bujijawuta.atwebpages.com/molecular_diagnosis_of_breast_cancer.pdfIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_182161ccebed4285b64e1999a1be59fc.pdf?index=trueIn PDF document text
    • http://mepitar.atwebpages.com/24794583923.pdfIn PDF document text
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_6c8c500b83424384a89fdecb7da97997.pdf?index=trueIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_cb76472bcd044faeacd02284228edd32.pdf?index=trueIn PDF document text
    • http://rodedewezijore.atwebpages.com/snow_in_midsummer_plot.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_dedbb3c285dc4eee88a86de44345526d.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE997 5564 bytes
SHA-256: bbcda0844e64705e4f1bb5037c87813b91cf049f85a88a25d4df5b3ffdf7dfde
font_01_sfnt_off0000fc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2F 11972 bytes
SHA-256: 03b5f7f9f557a59861e0713381d1e8365ceee7a15670ba7a68ffc6cdab297697

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