Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bddb4dd5f12f16b…

MALICIOUS

PDF

87.1 KB Created: 2021-05-02 05:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: de7412a361390d1ac33c3853eac5d193 SHA-1: 49282b89bd4065fbe5639d37925b63f8b8dbcdd8 SHA-256: 1bddb4dd5f12f16bc9e9ca62c2d698f207f9b88799bea6de15a2020bc3b9edb8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary suspicious URL identified as 'https://seumenha.ru/strik?utm_term=summary+of+life+of+pi+brainly'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://seumenha.ru/strik?utm_term=summary+of+life+of+pi+brainly PDF link annotation
    • http://zesaguzijor.mypressonline.com/93535852211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449184/normal_600d05690895c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366347/normal_60081ea5e3c9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529095/normal_60303ff6aff76.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/gIiaXZl/tic_tac_toe_emoji_game_in_python.pdfIn PDF document text
    • https://tamegafatukof.weebly.com/uploads/1/3/4/4/134400059/pepivonubigupurene.pdfIn PDF document text
    • https://cdn.sqhk.co/sufokorume/gcYjebz/28769479018.pdfIn PDF document text
    • https://fonixokud.weebly.com/uploads/1/3/5/4/135400654/315467d7e48eb.pdfIn PDF document text
    • http://dejivuxa.mygamesonline.org/mitareve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450501/normal_5ffaee3515eef.pdfIn PDF document text
    • https://gepufefodu.weebly.com/uploads/1/3/4/0/134013389/1747291.pdfIn PDF document text
    • https://cdn.sqhk.co/dofulokune/Picshh7/4498621603.pdfIn PDF document text
    • http://jipetabonitu.mywebcommunity.org/unity_assets_bundle_extractor_among_us_download.pdfIn PDF document text
    • https://vinokiwofexuge.weebly.com/uploads/1/3/6/0/136095936/4760849.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dasopikabuma.rf.gd/telecharger_alter_ego_a2_gratuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06e4127a-0f98-4bed-99ee-af7585018d7a/lexus_rx_hybrid_gas_mileage_2015.pdfIn PDF document text
    • http://zujisofivo.onlinewebshop.net/68271103520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2b9d79d-0679-4c20-87bb-dcd50de06808/malarar.pdfIn PDF document text
    • http://vofejobuvokare.rf.gd/zeruxixod.pdfIn PDF document text
    • http://bugazepoja.onlinewebshop.net/plano_alimentar_saudavel.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF753 5216 bytes
SHA-256: e664402f46567d1ee0cabe3da1147fc9707e0a238f2a8a1dcd6ab357df815bd7
font_01_sfnt_off000108f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F8 2616 bytes
SHA-256: 8ae719a02ad39d6a026be37ea4be74dc41b5c5da3fe3d2ef4974e95732d0bdd3
font_02_sfnt_off00011442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11442 10716 bytes
SHA-256: 3db18dd3599b9d5a48d939e105934f90d8513cfa6b643a538f40bd6496b8f0c9
font_03_sfnt_off000137e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E0 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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