Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d547073ab1787d…

MALICIOUS

PDF

76.8 KB Created: 2021-03-19 05:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0053103aa130bd2b956e20d8850b1d2f SHA-1: 8e0170c032e0a6eb88c608b3798f85f6b8136a78 SHA-256: 96d547073ab1787d6940923253d2e891bdb7704a82ba580a9ae2d6a8efc9274a
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=tm+ac1900+asus PDF link annotation
    • https://gebuzikiko.weebly.com/uploads/1/3/5/4/135400935/3530348.pdfIn PDF document text
    • https://sizutipaji.weebly.com/uploads/1/3/2/3/132303075/kevikutawotel-nuwilamulavom-velipejus-kutedikina.pdfIn PDF document text
    • http://tosanigepa.iblogger.org/vutitikugape.pdfIn PDF document text
    • https://wedezetepeb.weebly.com/uploads/1/3/4/5/134528952/vopopulopava-xuniti.pdfIn PDF document text
    • https://sidilatadafexu.weebly.com/uploads/1/3/1/1/131164021/mafug-kebolepusir.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/gym_workout_plan_for_beginners_female.pdfIn PDF document text
    • https://xigowobil.weebly.com/uploads/1/3/4/6/134645495/7363330.pdfIn PDF document text
    • http://bekasopeli.22web.org/calculator_plus_hide_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://c22e5cf4-338a-4003-9cad-c1cb0be29285.filesusr.com/ugd/3db607_10c58568acd943dc8130dfa99980df58.pdf?index=trueIn PDF document text
    • http://kitilogokufalu.atwebpages.com/sabirenejunimorobanopogab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8baf7849-289d-4e6e-95c4-b70297011d62/phoenix_sorcerer_revised.pdfIn PDF document text
    • http://rorokepu.atwebpages.com/understanding_github.pdfIn PDF document text
    • http://kugexuluke.epizy.com/36411898636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/608efb54-3058-498b-b8cf-5a5fe772172a/how_old_was_mr_darcy_in_pride_and_prejudice.pdfIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_ec0f75eb197045cda7eaea85aacdc808.pdf?index=trueIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_647336ae911240a4a4e70a506bc909f2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8bec4e9-5591-4dbb-866c-8dc7b234ee27/28398303400.pdfIn PDF document text
    • https://2aa0b900-127f-4603-a19a-6a731d3c9eb1.filesusr.com/ugd/5eaffa_6ef8446bf6d74681a3fce34ad8ad6489.pdf?index=trueIn PDF document text
    • https://7f2467c6-0d80-4e38-8df7-27624e0b9669.filesusr.com/ugd/e19533_b002c689ba674808b6c762f226e93cc9.pdf?index=trueIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_b3a138aa2d304c3eb6c487db2d8ff0ec.pdf?index=trueIn PDF document text
    • http://titaleze.rf.gd/can_i_eat_before_a_life_insurance_exam.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/13763636647.pdfIn PDF document text
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_5135b1bf779c42218e7885d4acc84085.pdf?index=trueIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_b7b5fb621a5a4751af20159fdc3cd9c5.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 4536 bytes
SHA-256: d351dd2930a2b76a004ec41268b8d54ca6863b68b6bc675cfa52cfc34f1eead6
font_01_sfnt_off0000f1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F7 10976 bytes
SHA-256: a31ad23aa471b2d3fb5119c97c27848461f22c789e4f275c02ae44adbe4b44f5
font_02_sfnt_off000117ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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