Malicious PDF — malware analysis report

Static analysis result for SHA-256 0778ee343be968a4…

MALICIOUS

PDF

113.2 KB Created: 2021-03-01 05:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c7e68c5c34bca721997618fcc21532af SHA-1: 93f0847f9626318cf3cd69ca347d32169b6f8f91 SHA-256: 0778ee343be968a4cb353d9791c3d0f30cec64235880ffd9ba62011e271839a4
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 0.9996

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://kuzutuzo.ru/strik?utm_term=greek+play+antigone+summary PDF link annotation
    • http://biniwitovo.mywebcommunity.org/japanese_woodworking_joinery_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443329/normal_5fe8cba2aa16d.pdfIn PDF document text
    • http://medgaj.com/oklahoma_cdl_practice_test_general_knowledgeklv8w.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxomawelej/lsUhagd/pastel_goth_fashion_makeup_dress_up.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443823/normal_60265d08319d6.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/pojimawujelelobama.pdfIn PDF document text
    • http://lightstart.xyz/nursing_drug_handbook_2021_onlinec7noe.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/eso_night_mothers_gaze_crafting_location.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379217/normal_5fec8dc25fed2.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/zonukuzovoxumazigevimu.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzixapudel/Ngdgfid/72672362025.pdfIn PDF document text
    • https://cdn.sqhk.co/goseluna/gjdPVry/77055069795.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498348/normal_5ff11650e188a.pdfIn PDF document text
    • http://greyfruit.space/zisimenu4furh.pdfIn PDF document text
    • http://summ-green.fun/mate_10_liteov23l.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/an_introduction_to_applied_econometrics_kerry_patterson.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/0KNiaAe/vojorep.pdfIn PDF document text
    • http://taxavifosobedul.iblogger.org/vuzisagimozoxifif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rojuzejuleg.rf.gd/bukesagow.pdfIn PDF document text
    • http://fepavipa.epizy.com/57336366502.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/metal_gear_solid_1_pc_cheats.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16127 5336 bytes
SHA-256: 95a641666ff335eb9d9594eca7eae793f51fc0f192f96ae6438e08f1a3f569a2
font_01_sfnt_off0001734f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1734F 11740 bytes
SHA-256: dfd508d82f5a4662f5a9e956655fda570b999c296c145e7158622b17e9555572
font_02_sfnt_off00019a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A82 18312 bytes
SHA-256: 6055af6157dc8b02a92a33aa2f591680235b31490b620c11a7de4d0680346116

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