Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2765c0c742ac27…

MALICIOUS

PDF

87.6 KB Created: 2021-03-25 12:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5bf95d69319513857cf71140cf2ff859 SHA-1: 10ddf7ec4c0e6fca38c7e04f9fb950a44b1f4b43 SHA-256: 4b2765c0c742ac27f01390c95b38e01e6554e6165273b0f7321a7bf5b35a537e
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-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/strik?utm_term=percy+jackson+and+the+lightning+thief+full+movie+watch+free PDF link annotation
    • http://kupawawade.22web.org/13248330225.pdfIn PDF document text
    • https://cdn.sqhk.co/zawukomofise/ihbha27/palajo.pdfIn PDF document text
    • http://medicalpracticementor.com/jivusexutazajenufuwivea7m0j.pdfIn PDF document text
    • https://cdn.sqhk.co/vamosopon/Jbwibif/85630458256.pdfIn PDF document text
    • http://kupufevi.22web.org/aman_anti_ragging.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/ritiwapixugazetiziulmhd.pdfIn PDF document text
    • http://tevazodufo.iblogger.org/lights_on_afterschool_coloring_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/xejadukoxeta/aKsBmii/money_makers_soccer_predictions_plug.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/oheLijW/space_rush_game.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/ejfhejh/83986673113.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/99405883231.pdfIn PDF document text
    • http://waxuxeg.rf.gd/lasoputebakovob.pdfIn PDF document text
    • http://xizokokov.epizy.com/practical_driving_test_qld_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7658307-eb19-4811-9012-f47e01e54208/casio_g-shock_armbanduhr_mrg-g1000b-1a4dr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be773b5-b768-4712-b2a7-78b545753699/rogilesajosos.pdfIn PDF document text
    • http://natidifober.epizy.com/18145696783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b55cac-5221-4f89-8d9a-537dce1bdb53/college_writing_skills_with_readings_9th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d70d511-2ca0-424a-ae83-6fd4b1424905/xugad.pdfIn PDF document text
    • http://vodupuginotipir.rf.gd/biological_science_dictionary.pdfIn PDF document text
    • http://lenixad.epizy.com/dopijegawigivofidijomowew.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10079 5828 bytes
SHA-256: 5bbbcb59f29849284666e56cb486d26d9a7f3967ae5f629807cfbd9c7159bca4
font_01_sfnt_off00011449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11449 11408 bytes
SHA-256: 11f80b933c610bb9eeafb670aef93ac7b45fcf136d46e9b1abb5bc83bebde723
font_02_sfnt_off00013b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B34 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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