Malicious PDF — malware analysis report

Static analysis result for SHA-256 009e3a86a8257f08…

MALICIOUS

PDF

72.2 KB Created: 2021-03-27 23:52:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4053eee726c2dea19a5cb60eb9c05656 SHA-1: 6615583931bf627164c9d506a7f8286cce95bb47 SHA-256: 009e3a86a8257f08cc673f7ed99e92c5e1d0287939dc3f317b6cc2a7a6cb41d9
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to PDF files hosted on various platforms, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the heuristic firings for PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK confirm the document's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://xezojetit.ru/award?keyword=whole+circle+bearing+and+quadrantal+bearing+pdf PDF link annotation
    • https://valuluxunu.weebly.com/uploads/1/3/2/7/132710491/f04c73e584c74b.pdfIn PDF document text
    • https://dimazupaw.weebly.com/uploads/1/3/2/8/132814154/vezegawevamaromurex.pdfIn PDF document text
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/ed06b7845f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464311/normal_6013324829d87.pdfIn PDF document text
    • https://sefelitajirowa.weebly.com/uploads/1/3/0/9/130969992/geduwivuke_wuweko_nawovif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493541/normal_602ea2dc777e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447084/normal_601b7bd9b05aa.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/punagilelabon/cyber_risk_management_framework_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/71202027037.pdfIn PDF document text
    • http://misibumisap.rf.gd/rujezalamukororege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf6851e-673a-4637-b0ac-fe2259b66cda/onetouch_ultra_2_control_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf56fd34-b82e-410b-8ebc-82fbeaee5915/7850607564.pdfIn PDF document text
    • http://durezalur.epizy.com/webster_dictionary_download_free.pdfIn PDF document text
    • http://fevidubigozexa.rf.gd/brahmo_samaj_history.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/zelewow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/740baeb9-376b-4b4e-8943-4e93b68e045c/74602868876.pdfIn PDF document text
    • http://rogofijanititad.epizy.com/22409237030.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/bird_beaks_and_feet_adaptations_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/godin_a6_ultra_koa_test.pdfIn PDF document text
    • http://xepolowamozuxan.rf.gd/carr_s_group_plc_annual_report_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/805f6ebb-df80-494f-b2f4-38a84a71402f/how_to_do_summary_statistics_in_r.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/vogetoniza.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD325 5516 bytes
SHA-256: 7debd189b0e6ac49ab08b98b705360d2f150c06efec99e63b10cb7cf98f34faa
font_01_sfnt_off0000e5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DB 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000ee68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE68 10624 bytes
SHA-256: 756262f4b162a415c5b07313d16a5002db006c4a0c3f25fc15805246765f1082