Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf5f7061b443aa9…

MALICIOUS

PDF

81.4 KB Created: 2021-03-17 02:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3466c1b4b5e37c91543cee0b8abbf816 SHA-1: a687011f9eb90851084c314924c692250103211a SHA-256: abf5f7061b443aa9681fdca1a944b1557cc2f75c77a28e0a930198b720afea32
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique commonly used in phishing campaigns to redirect users to malicious websites. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classification strongly indicated maliciousness. The presence of multiple external links suggests an attempt to lead users to phishing or scam pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://fokemale.ru/strik?utm_term=british+army+reserves+pay+scales+2020 PDF link annotation
    • http://tumbochka.space/transfer_dvr_recordings_to_external_hard_driveq68bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_604cb9863a294.pdfIn PDF document text
    • http://aduo5.online/23370994132cblcq.pdfIn PDF document text
    • http://gayerkan.com/java_game_programmingtxuai.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443325/normal_5fe5ad3217cd6.pdfIn PDF document text
    • http://tohld.in/vsphere_client_5._5ka3jc.pdfIn PDF document text
    • http://flipping-car.online/53426202309aqlrz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446174/normal_604326edbaebc.pdfIn PDF document text
    • http://itash.space/fundamentals_of_general_and_organic_chemistryue2mv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472185/normal_6009845e33740.pdfIn PDF document text
    • http://optarfes.com/bhabhipedia_movie_300mbq18wn.pdfIn PDF document text
    • http://energierecrute-emplois.com/little_albert_experiment_ethical_considerationsk8h8q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/que_tipo_de_gobierno_tiene_cuba_y_venezuela.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/29434457814.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/navy_uniform_regulations_all_weather_coat.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/guzevaduxasunipinofegasuj.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/boluxewowijarikegurage.pdfIn PDF document text
    • https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_745977176c8248caaa013885480b7e32.pdf?index=trueIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_17926f9d619347cdb6d291d23ef86738.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gusule/11408952959.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/liver_cancer_nccn_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/josuzijebok.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/oxonium_salt_formation.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_off0000fd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4C 5660 bytes
SHA-256: 88f30f2292066f6f1954d672e78cb8e351c5935d4fbcd0d1573be09416a60d76
font_01_sfnt_off0001106c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106C 11136 bytes
SHA-256: c2f5bf424f84ff39d21b23024ffc336b34ba73e63ff8733c7439d479618daa81

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