Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6fe3a1479db4e1…

MALICIOUS

PDF

74.0 KB Created: 2021-02-11 22:31:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8135576583da2d0adc765fd95bae9743 SHA-1: 97d7673c7be6b90288844a02d7500710168888fc SHA-256: 0a6fe3a1479db4e1787858c283c085ec928a9737125213848c5aaf06a1d15de8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external URIs, 'https://maypoin.ru/wb?keyword=kindergarten%20lined%20paper%20template%20pdf', suggests a lure to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://maypoin.ru/wb?keyword=kindergarten%20lined%20paper%20template%20pdf PDF link annotation
    • http://varnisvakq.ru/99057515326l060n.pdfIn PDF document text
    • http://boothattendant.com/mohini_sethi_catering_managementxsuv9.pdfIn PDF document text
    • http://bodyita.space/pujesewodusejamirotkvs3z.pdfIn PDF document text
    • http://cosmicgig.com/71873276675dnzmy.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/932e71ab7f2b72e.pdfIn PDF document text
    • http://vash-fasad.live/82146621131hxp67.pdfIn PDF document text
    • http://shopbest.online/whatsapp_software_for_pc_windows_803rcx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450513/normal_5fc8a8173332c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381976/normal_5fecf9542f3d6.pdfIn PDF document text
    • http://tryne.xyz/gestational_diabetes_management_guidelinesj8jht.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/wapabefizosumi/almond_breeze_milk_nutrition_information.pdfIn PDF document text
    • http://xinudekewukipi.rf.gd/96746584930.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/samulefatitinukejabavi.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/asuran_movie_box_office_collection_report.pdfIn PDF document text
    • http://tefesapebeto.rf.gd/zajegiba.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/adding_and_subtracting_decimals_practice_worksheet.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_off0000e200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE200 5152 bytes
SHA-256: 7ddfae2f8054d6d9b313107178a4d639743ac7f5bfd3edd9b6e569a7a76f93ba
font_01_sfnt_off0000f380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF380 11768 bytes
SHA-256: 9a5eb230f413e2e2491dbffc6fb5e6857aa85172057edf5ff6ec332faab36934

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