Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc6d4ee02ba13ea…

MALICIOUS

PDF

77.4 KB Created: 2021-05-03 18:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a3a1ad17bf188b63438a9ad382ed2d2a SHA-1: 3eb4c36e7e5ea871951b9e488f34e1adeb36f59b SHA-256: 6fc6d4ee02ba13ea64f6420761ad55a420d12816181259fc22353c48ae095687
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are to obscure domains, indicating a link farm or SEO spamming operation. ClamAV and ML classifiers identified this as a phishing or malicious PDF. The primary malicious URL identified is https://druttle.ru/strik?utm_term=como+trabalhar+para+um+idiota+resumo.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://druttle.ru/strik?utm_term=como+trabalhar+para+um+idiota+resumo PDF link annotation
    • https://cdn.sqhk.co/zidodovare/hdnPjjC/2_player_fighting_games_free_pc.pdfIn PDF document text
    • http://zutalinezar.iblogger.org/talazab.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/fjhykgc/texas_longhorns_ncaa_basketball.pdfIn PDF document text
    • http://kifepivukog.iblogger.org/runonubaboviluwon.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://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_125ecf7c62fd4b34b0939e3225691a3f.pdf?index=trueIn PDF document text
    • http://kesazubajumat.rf.gd/69562521932.pdfIn PDF document text
    • https://c140f178-ee45-427e-91fe-a3c5f821f67e.filesusr.com/ugd/ebc5f9_84a14c30128b4fd1b8a4e01e210e13da.pdf?index=trueIn PDF document text
    • http://bovinow.epizy.com/toyota_hiace_2019_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/arbitration_guidelines_accc.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/15234356255.pdfIn PDF document text
    • http://xitevesapa.epizy.com/12783797278.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/why_is_my_washing_machine_so_loud_when_spinning.pdfIn PDF document text
    • http://xevivalekivo.epizy.com/70167628824.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/pulabofividefukanomofak.pdfIn PDF document text
    • http://botasalipigu.epizy.com/inventing_merit_badge_worksheet.pdfIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_212fa63d2d3b4d4a9de8c1f1b34d15d7.pdf?index=trueIn PDF document text
    • http://riberudedanute.epizy.com/kiriri.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/dworzec_pkp_bielsko_biala_informacja.pdfIn PDF document text
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_2bfe1af4cf0745bf89c5f739a47f1656.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_off0000dfec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEC 5136 bytes
SHA-256: 3261eb6fb9c6df54e78d6841b5a087db1319adac53c1b1674639c9f439565580
font_01_sfnt_off0000f152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF152 12860 bytes
SHA-256: a569da1a6bbc1194083b0d15545b8683652c5d8e4d64f5ab6ec980eba49d576b
font_02_sfnt_off00011887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11887 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.