Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d55c0a90cc2c1c5…

MALICIOUS

PDF

71.0 KB Created: 2020-11-26 15:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c1346c8e0cd191e4c7dab40b5c0b45c9 SHA-1: 52dca7959230d7b393d89b38df26296555d8786b SHA-256: 5d55c0a90cc2c1c5292dd78bbc177d8dd143d4b50d5a7bedfbdfa5ece25dda47
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'hand crank sewing machine for shoes' and embeds a URL pointing to 'traffnew.ru'. This URL is likely used to redirect the user to a malicious site, consistent with a phishing attack. The ML classifier and ClamAV detection strongly indicate malicious intent, and the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=hand+crank+sewing+machine+for+shoes PDF link annotation
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/jewizokur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f883b644cfd7.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/e8631.pdfIn PDF document text
    • https://kenumobubedu.weebly.com/uploads/1/3/4/3/134370592/pudezoke.pdfIn PDF document text
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/74bf3281.pdfIn PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/bulaxewawog.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/aa2a73fb-2bdb-4d5c-93b5-336808c729ad/99453527541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff14e83-9a1d-4e84-83a8-7fc460befd34/hunger_games_full_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1ec0ef-9b5f-48ae-b00d-14890e8a6f49/72861914563.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_off0000d8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B8 5520 bytes
SHA-256: 0f43d5e00eb3ac366c351af35c3dd5deb29c805e8dd620b2e7ee6f7a78d0a674
font_01_sfnt_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 10776 bytes
SHA-256: 30a8a1fd0f8046ec083406acc770c6501c64969b903f08759110316b19fc72fc

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