Malicious PDF — malware analysis report

Static analysis result for SHA-256 3132bd8bbcdaf5da…

MALICIOUS

PDF

72.1 KB Created: 2021-03-14 20:16:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 013f44f420f1030fc87753be88583090 SHA-1: 6b85eab763621c5bb9ecc901f7c763d0fbc82b67 SHA-256: 3132bd8bbcdaf5dab0d8408b9693f34ee1696d2287495e8bed3d8d53b09f9948
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL, https://mezovuduw.ru/wix?keyword=tu+fidelidad+es+grande+pista, flagged as suspicious. The PDF structure and the presence of embedded links suggest a phishing or malware distribution attempt, likely using a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/wix?keyword=tu+fidelidad+es+grande+pista PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454040/normal_604954585741c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_5fd195bcb2a6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423752/normal_5fc9bce150965.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497697/normal_5ff63048e4e84.pdfIn PDF document text
    • http://mozakotefeg.22web.org/zuxufijerofivamabuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411218/normal_602386e1d85ec.pdfIn PDF document text
    • http://bujinolemisizam.iblogger.org/revaluation_account_partners_capital_account_balance_sheet.pdfIn PDF document text
    • http://kafojiv.iblogger.org/89515653637.pdfIn PDF document text
    • http://pefujogori.iblogger.org/98309264374.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuxunefilat.epizy.com/uk_military_rank_equivalents.pdfIn PDF document text
    • http://vakifopifin.rf.gd/bloons_tower_defense_6_apk_aptoide.pdfIn PDF document text
    • http://foxadawimuwewar.epizy.com/91141661527.pdfIn PDF document text
    • https://9f503c4c-bf14-4dcb-9a7a-68e0e5bb3568.filesusr.com/ugd/8ac1ab_d747ac265b0c4ebeb50ea86cc41804c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/546c0a4d-0eec-4418-b174-1704a8e459c9/apc_ups_blinking_battery_icon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d3b4a25-e568-4d6f-82b1-7e91165a5089/disuzezetob.pdfIn PDF document text
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_bc1e01052a6a449f9f7c2b995097fabe.pdf?index=trueIn PDF document text
    • http://varupijijajeb.rf.gd/how_to_thank_a_board_member.pdfIn PDF document text
    • http://betiravel.epizy.com/google_spreadsheet_app_for_mac.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_c23f080b58d5466ca65aa59b9d754ca0.pdf?index=trueIn PDF document text
    • https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_800ad06c309c4aa8a33a1cd14e0f9f9b.pdf?index=trueIn PDF document text
    • http://dokozew.epizy.com/xowufofosaserofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d21577-6352-452b-8ff3-6f6ff437b09b/wordly_wise_3000_book_6_4th_edition.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_off0000d96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96F 5160 bytes
SHA-256: 1c1e02ee9f45ed00bf37f1492b5a91ca1ec38eb064cc48cff56843881058b161
font_01_sfnt_off0000eb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0D 12300 bytes
SHA-256: 6e0e76ed22f21bfa4bbec5ecfcb0ba665c3c99f58fba7db44559676b1ce07446

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