Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2b84013d68b461…

MALICIOUS

PDF

76.2 KB Created: 2021-04-06 11:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fc973f2b796b052f06e7ab0c62605aed SHA-1: b0ef208a9adf5cf4d47c41288f27c8afa3605e4c SHA-256: ed2b84013d68b4614c23fde9bfab9b63774b51a1f9f9b7df0be87f9c53729a6c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/aws?utm_term=what+are+the+marine+radio+channels PDF link annotation
    • http://afterdealer.pro/654270453263kbmb.pdfIn PDF document text
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/470408.pdfIn PDF document text
    • http://ladujose.sportsontheweb.net/jalojorazalen.pdfIn PDF document text
    • http://itawegan.space/schwinn_mens_standpoint_27.5_mountain_bike_reviews97m1m.pdfIn PDF document text
    • http://freedate18.xyz/jiwivolavaxikezomo8yv96.pdfIn PDF document text
    • http://rakadan.sportsontheweb.net/husqvarna_450_rancher_bar_length.pdfIn PDF document text
    • http://newberginvestmentproperty.com/95169677137ve3hg.pdfIn PDF document text
    • http://fredo.run/71341253687vps5f.pdfIn PDF document text
    • http://busforpay.online/holmes_air_purifier_aer1_blue_button9j647.pdfIn PDF document text
    • http://copyrightshelpcenter.com/michel_de_montaigne_essays_best_translation1rg9j.pdfIn PDF document text
    • http://ueuniti.xyz/nowiporekidunobas4w2h.pdfIn PDF document text
    • http://limaxinsto.xyz/voguluzebd2kz.pdfIn PDF document text
    • http://vijofudevadotar.mywebcommunity.org/amazon_strategy_case_study.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/1fc85b3db1c.pdfIn PDF document text
    • http://energytik.net/medication_to_treat_adderall_withdrawalw6bl7.pdfIn PDF document text
    • http://disconto50.pro/safuvefexugogawovujuxirij1ekh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/cisco_ccnp_route_lab_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/portugal_the_man_album.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/ezdrummer_2_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/christmas_tree_vector.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 5192 bytes
SHA-256: 9c2504a6eeaeb50337944bf2ae6a6405fabe3ef7dc28dcb3f921bf7a17f335c7
font_01_sfnt_off0000fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 11256 bytes
SHA-256: b3b62ce4d5fbdd4ac2d27d5fbe147285c0f9303349e73815ca3b25c5d784b759

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