Malicious PDF — malware analysis report

Static analysis result for SHA-256 d624a737953bd82e…

MALICIOUS

PDF

81.6 KB Created: 2021-03-15 17:31:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d52293dab111d5a95457a6981293f689 SHA-1: 1a220f40ce000d1ddc9652c2c9ff82aef225b495 SHA-256: d624a737953bd82ee233927f31200600b352c4341eacfe59d565cfe32db5f09a
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a lure for search terms like 'Honda rebel 300 for sale sacramento'. The numerous embedded URLs, many hosted on disposable domains, indicate a phishing or scam attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=honda+rebel+300+for+sale+sacramento In PDF document text
    • http://lotupojaxuvutix.mygamesonline.org/accu-chek_aviva_connect_blood_glucose_meter.pdfIn PDF document text
    • http://visetazide.medianewsonline.com/articles_multiple_choice_test.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_6023dd08241de.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/21_irrefutable_laws_of_leadership_summary.pdfIn PDF document text
    • http://xilexevu.scienceontheweb.net/data_analysis_tools_in_research.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404308/normal_6032d18ba15a6.pdfIn PDF document text
    • http://vovality.club/316187432641e9zx.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/rupenenezovedajezigu.pdfIn PDF document text
    • http://bottlechainworld.com/libros_cristianos_gratis_por_correohzlqu.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/50077564430.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366335/normal_5fe0253462c18.pdfIn PDF document text
    • http://tujidal.mypressonline.com/dudulurezababotiz.pdfIn PDF document text
    • http://bioforce-co.site/reset_and_program_genie_wireless_keypad-ic_black_modelognav.pdfIn PDF document text
    • http://misujupino.getenjoyment.net/2883408193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_602eff9f70d34.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/one_of_us_is_lying_audiobook_full.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/lowrance_elite_5_hdi_gps.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gipetiwivi.atwebpages.com/50708478363.pdfIn PDF document text
    • http://widifusi.myartsonline.com/whirlpool_dishwasher_wdf520padm3_not_drying.pdfIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_042e5b7e43aa463ea3d34c33d9383ca8.pdf?index=trueIn PDF document text
    • http://gifidabula.atwebpages.com/34806368944.pdfIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_65daa2ef8bd14282954168595409f1e2.pdf?index=trueIn PDF document text
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_8e9cf2efa5c042248797e1d4cc57ddb2.pdf?index=trueIn PDF document text
    • http://zijiwaras.onlinewebshop.net/85661954379.pdfIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_157d15d813844d91893c3389ad5d11b5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF082 5316 bytes
SHA-256: 30a1a01d0a41c39081d35f9e9214a09191b0d717646f9c8262589a300520399f
font_01_sfnt_off00010271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10271 11280 bytes
SHA-256: 929b65f9676e14b41563b15c66d9ce5e1a922d1eb2f76a178b7d4cde67186c92
font_02_sfnt_off000128b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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