Malicious PDF — malware analysis report

Static analysis result for SHA-256 762f2fd3066b427a…

MALICIOUS

PDF

79.7 KB Created: 2021-03-23 14:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d82b52ad554953d9d4aff3c10b956e4c SHA-1: ef2dbe0ea0e9290fd7dbd6c8012ef91f1d8a1c24 SHA-256: 762f2fd3066b427adb54b568abe45741350e70825751281d98e3171835a835cb
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs, suggesting it functions as a link farm or phishing lure. The document body, though heavily obfuscated, contains text related to 'distance and midpoints answers', likely a pretext to direct users to malicious sites like https://jumiwimov.ru/wix?keyword=1-3+distance+and+midpoints+answers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://jumiwimov.ru/wix?keyword=1-3+distance+and+midpoints+answers PDF link annotation
    • http://lorezagosuvese.scienceontheweb.net/rivijum.pdfIn PDF document text
    • http://3bureaureport.info/gofefenefozaxovalmqu5e.pdfIn PDF document text
    • https://cdn.sqhk.co/xugiwatokax/jdiahfI/kumosudazufeziw.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/rovomakawawiganig.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/how_to_estimate_mean_from_grouped_frequency_tablegrrfi.pdfIn PDF document text
    • http://confirmationhelpcenter.com/loteviponenolezwlru9.pdfIn PDF document text
    • https://xovonugobo.weebly.com/uploads/1/3/4/6/134688771/8378850.pdfIn PDF document text
    • http://kirudikegopoded.sportsontheweb.net/jbl_boombox_vs_xtreme_2_specs.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/jatotukuxodagokibuvix.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/shark_ion_robot_vacuum_r75_with_wi-fi_rv750_reviews.pdfIn PDF document text
    • http://themarkuzmusic.com/3880693692zvxw3.pdfIn PDF document text
    • http://erogan24.website/5462232924025nrh.pdfIn PDF document text
    • https://fodewifejala.weebly.com/uploads/1/3/4/4/134491976/xapaluvibi-rixubabo-xakosezo-gogodubome.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/ripupugawo.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/algebra_lineal_grossman_septima_edicion.pdfIn PDF document text
    • https://cdn.sqhk.co/modesarox/jgiThcu/best_amazon_prime_daily_deals.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c32e81de-d540-4622-8afe-3be03a6777c8/what_can_i_eat_on_a_gluten_free_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceaa5e09-b42d-4d79-ac34-67a24da78c40/33895427057.pdfIn PDF document text
    • http://mifojizu.myartsonline.com/the_original_african_heritage_study_bible.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_off0000f743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF743 5432 bytes
SHA-256: 9776a6a29109c0f88c019baa8205ee2e4fdd5726c86a6d5bc14b0dc3b88018dc
font_01_sfnt_off000109be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BE 11896 bytes
SHA-256: dbb90f9b095d807e9f35a5ee15acb946cac60ca0fb28f73457b347bc3bcd88dc

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