Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3d706749d533fe…

MALICIOUS

PDF

78.0 KB Created: 2021-04-28 13:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 248946856fc85794333ca6832f5b2ada SHA-1: 85fa7964dffd18d086475bd47791df3021148640 SHA-256: cc3d706749d533fe34aee7ab5f16d2ab80fdf56f60d438e7a971ba830390a9d2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains heuristics indicating it is a link farm and a lure for command execution, instructing users to copy and paste content into a shell. The embedded URL points to a domain associated with malicious activity, suggesting the document is designed to trick users into downloading and executing further malware. ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=realtek+high+definition+audio+driver+for+windows+10+64+bit+lenovo PDF link annotation
    • http://zogeditel.iblogger.org/10924166886.pdfIn PDF document text
    • http://votexetoke.iblogger.org/47571603567.pdfIn PDF document text
    • http://julaximufe.66ghz.com/maths_quantitative_aptitude_formulas.pdfIn PDF document text
    • http://nadozigipak.22web.org/uae_employment_contract_template_word.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_8dada1e1b70f44d9b2c320b10a23fa23.pdf?index=trueIn PDF document text
    • http://vurakov.epizy.com/inverter_welding_machine_circuit_board.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dbe8d2c-206d-4ebc-b0d1-fad979e2c621/is_newsmax_on_dish_network.pdfIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_7b0dd4ff61ee4bfd918da63b9a176157.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rejiner/zokekiwopidatamevagubafi.pdfIn PDF document text
    • http://jumajiker.rf.gd/the_maze_runner_2_movie_download_in_tamil.pdfIn PDF document text
    • http://vigamoburijom.rf.gd/4015457784.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_dd2f95f806f84a7bb2150bdc7ee2e4f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/5356376442.pdfIn PDF document text
    • http://wepesubotivirel.epizy.com/21291820958.pdfIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_3a03a38a53454011870521cc41adffa5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f38a7ea-3f23-4546-b571-53f52bc917d1/araby_james_joyce_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e99b25b4-8de7-4554-abe5-446bafc759dd/55196947495.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/lake_eufaula_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/how_to_set_time_on_tissot_t_touch_2.pdfIn PDF document text
    • http://sadakukozami.rf.gd/backorder_processing_in_sap_sd.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_off0000ef74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF74 5968 bytes
SHA-256: 0541c852b2107b5f4107172df4a72314256e1afb72d30bf97543cc295fbd7e7a
font_01_sfnt_off000103da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DA 11224 bytes
SHA-256: acfbd7bd851f236466bded8563869227578d6461271c475803d08e8bbd241bbb