Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb12f0fcdf7827f9…

MALICIOUS

PDF

80.9 KB Created: 2020-12-28 10:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7dc0e260617363ac1a5344d158d5a0a3 SHA-1: d0f4278609985cfdebe4d8979349ee8fc78a2ed6 SHA-256: bb12f0fcdf7827f9b831554e29dc13706502bd0950ec09eee9d2f7d024425201
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. The ML classifier and ClamAV also flagged it as malicious. The presence of embedded URLs suggests an attempt to direct users to potentially harmful external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/strik?utm_term=disneyland+paris+annual+pass+cost In PDF document text
    • https://cdn.sqhk.co/golizojuw/HVgjGrx/ates_ve_su_2_kisilik_oyun_oyna.pdfIn PDF document text
    • https://cdn.sqhk.co/xiteduva/ii6hjlD/the_pyramids_of_egypt_ies_edwards.pdfIn PDF document text
    • https://zevenilusowaj.weebly.com/uploads/1/3/4/3/134324486/8164141.pdfIn PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/9007699.pdfIn PDF document text
    • https://pozosukezogi.weebly.com/uploads/1/3/4/3/134386022/vozexisi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d472f863-5ecd-41b7-b0a2-63dcb7a1b76a/battletech_dropships_and_jumpships.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830b8118-8f6a-43ce-ab27-dab3ef781035/gotewitowegire.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/jio_message_app.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/crib_sheet_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd65490-8b1e-40bf-b04a-38bf7f52669a/19483280913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c7b406-8a10-4eef-9904-e6df1c39e742/fuentes_de_luz.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_off0000ff13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 5168 bytes
SHA-256: aad725a9efe1d90747b5a91692bb2f04b5851f029cfa6a2ea67723d88f2efd9d
font_01_sfnt_off000110c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C5 11260 bytes
SHA-256: 5b6bbbd99ff288819c31130132dad4d6e005f1d45fbb9441163a05c17d1adcce

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