Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7aee0a08b7eeff…

MALICIOUS

PDF

81.3 KB Created: 2021-04-01 02:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: bc0713efc8a76de829fb20a9fcdfc554 SHA-1: 06d39f902aaa80b5de2d450467cdd48e146c27c5 SHA-256: 8c7aee0a08b7eeffc9dba35b2cb346c7ec2a6b4650112261f76b590c9349d2c7
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to 'anime games for android free', which may be a lure.

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 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://maypoin.ru/123?utm_term=anime+games+for+android+free PDF link annotation
    • https://cdn.sqhk.co/lunajevon/hgfjcHe/kizudedeguxiwifezudixem.pdfIn PDF document text
    • http://jovepodixowofow.mygamesonline.org/stream_of_consciousness_writing.pdfIn PDF document text
    • http://tedurelaseji.mygamesonline.org/gokaduwegojatafanikesevar.pdfIn PDF document text
    • https://cdn.sqhk.co/dogatefi/iOihjdT/bafawugexajabezup.pdfIn PDF document text
    • https://cdn.sqhk.co/rowojazur/dheGhb6/80903621966.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/hejhhb4/cosmopolitan_las_vegas_hotel_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/tigepukeri/iihjeja/39031065845.pdfIn PDF document text
    • http://kuwibixavuxo.iblogger.org/donde_reportar_alumbrado_publico_en_hermosillo.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/jomamogonepebetug.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/18594602868.pdfIn PDF document text
    • http://zevibeponakat.getenjoyment.net/passive_voice_tenses_exercises.pdfIn PDF document text
    • http://dejivuxa.mygamesonline.org/kagojanirisuji.pdfIn PDF document text
    • http://kigumelez.medianewsonline.com/abaqus_analysis_user_s_guide_6._13.pdfIn PDF document text
    • http://fukijuwevo.getenjoyment.net/dowali.pdfIn PDF document text
    • http://kidiwutimako.mygamesonline.org/ge_healthcare_arrhythmia_recognition.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/zukogi/12854881048.pdfIn PDF document text
    • https://ddb281da-11d2-423e-b83a-408ecf1f607f.filesusr.com/ugd/9db61c_35dbf9e1a5104e12a530c45669bc7953.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/banca_digital_bod_descargar_apk.pdfIn PDF document text
    • https://a581e706-3bf6-41fb-8978-ad4d4077590d.filesusr.com/ugd/afbe6b_448e49129ed54eb0aa52d21977626f4c.pdf?index=trueIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_5d81822027e549b3835f6998000b57b6.pdf?index=trueIn PDF document text
    • http://zuzimekot.rf.gd/88647545579.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/71149735643.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/solobalurujafapuxogan.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_off00010206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10206 5184 bytes
SHA-256: f1e1583d88c42fb14f70c5e6f1ce51325c7f0a2a327655f20cb7654b1d6a28eb
font_01_sfnt_off00011393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11393 10532 bytes
SHA-256: 0b9c074816cb8e874871a3f9664ab79f828ae3ee493611a6fd5a0403897fd4e5

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