Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7fbb8ec995c0d8…

MALICIOUS

PDF

122.1 KB Created: 2021-03-15 07:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5fd765693b79f50dae58454398bbecc6 SHA-1: 6fcf72f3fc66f1d2aa7f5f737701fa23c97665f6 SHA-256: ba7fbb8ec995c0d8ece3d0daaf45b0e9d86472a2d16c5a42e8089a9495816090
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicative of a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/wix?keyword=go+math+grade+5+answers+chapter+3 PDF link annotation
    • https://cdn.sqhk.co/zexoribuj/awGjgge/virus_wars_unblocked.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/suvugugedinopep_zasarewovuda_kevekiri.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/b18d0124b3c.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/yhhy8hc/planet_om_nom_nom_chocolate.pdfIn PDF document text
    • http://zegigujeluk.iblogger.org/life_of_fred_apples_age.pdfIn PDF document text
    • http://meletemobu.iblogger.org/bandhan_movie_song_free.pdfIn PDF document text
    • https://kegalanomer.weebly.com/uploads/1/3/1/8/131856310/kelezopup.pdfIn PDF document text
    • https://badexakabenal.weebly.com/uploads/1/3/4/0/134017850/5485516.pdfIn PDF document text
    • https://gisunada.weebly.com/uploads/1/3/1/4/131409009/8996373.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/xggrhdY/sazalejalorenekizipudib.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/QlhdsyR/photo_studio_editor_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefulurifu/jpmjhij/wrong_previous_address_on_credit_report.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewakuw/iji9wCH/car_master_3d_online.pdfIn PDF document text
    • http://keburej.22web.org/74166878777.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/solonebosop/43897145388.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/kulajamekowilo.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/aida64_apk_4pda.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/8070074759.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/kuxalufix.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/savuzufowa.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/bombay_dyeing_bed_sheets_combo_offer.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/deficiencia_de_carnitina_palmitoil_transferasa_2.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/80511690899.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_off00019f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F1B 5868 bytes
SHA-256: 96bf4b1933661b9f0db17d76a729d6492086b134f8f51126449d00055583cc16
font_01_sfnt_off0001b305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B305 11576 bytes
SHA-256: 1554ba9919dd858f666391959f2f6c6643188ee07476c9b4b64f9426a5c0c223

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