Malicious PDF — malware analysis report

Static analysis result for SHA-256 b90e6c96a8e3722c…

MALICIOUS

PDF

76.9 KB Created: 2021-04-02 12:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f15f3df7be226ccf08111ccf1874758e SHA-1: 169f0fd1161135a23e5d3b623ba6c88ade81a120 SHA-256: b90e6c96a8e3722cb3c908c94c7b06ca9a821011e1cd4afe989760289e174ace
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-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://gimoguvi.ru/123?utm_term=building+construction+materials+pdf+free PDF link annotation
    • http://dozujudu.iblogger.org/daedalus_and_icarus_analysis.pdfIn PDF document text
    • http://tegeboxurogon.iblogger.org/wawipevakoxoki.pdfIn PDF document text
    • http://waparudadip.mywebcommunity.org/62384924972.pdfIn PDF document text
    • http://gajuduxotam.iblogger.org/zudowujajosogakamoju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_60244adbe0a16.pdfIn PDF document text
    • http://xenogogumemikek.66ghz.com/oster_coffee_maker_replacement_parts.pdfIn PDF document text
    • http://juzajikadig.22web.org/manafogomagivuvesiwo.pdfIn PDF document text
    • http://dedaruk.scienceontheweb.net/braintree_zoning_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413345/normal_5fd905831bec1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_6063ca02cb635.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://debagejusuwaj.epizy.com/xegumixozep.pdfIn PDF document text
    • http://nuboguvulasof.rf.gd/66347660270.pdfIn PDF document text
    • http://wuzazuj.rf.gd/sap_basis_full_notes.pdfIn PDF document text
    • http://fixomixipewuwa.rf.gd/number_the_stars_test_multiple_choice.pdfIn PDF document text
    • http://tejovixija.rf.gd/transformer_secondary_current_calculation_formula.pdfIn PDF document text
    • http://bilalukaseka.rf.gd/what_is_the_most_accurate_finger_pulse_oximeter.pdfIn PDF document text
    • http://xopalotopobeda.rf.gd/can_you_add_crunchyroll_to_roku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c454923-d96a-4611-83cd-e91a134f89be/xedixaserarakux.pdfIn PDF document text
    • http://jenepopavuse.epizy.com/how_to_use_bosch_pocket_scan_obd_1000.pdfIn PDF document text
    • http://bopubedoru.myartsonline.com/blood_type_genetics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd7d9a6-6c65-4fa0-96db-fb5223450719/business_ethics_concepts_and_cases_7th_edition_ebook.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ede1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE1 5524 bytes
SHA-256: aa3714fd7c6d133557c5f74cf52160e1a9de5921d9e2494e944e0c99195d081b
font_01_sfnt_off00010097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10097 11040 bytes
SHA-256: 93537571a60001cba02eb3a6bf11b6361d9244a5c75d43cf55a3091a348a20cf

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