Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d30125b0311af5…

MALICIOUS

PDF

64.8 KB Created: 2020-12-17 10:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 29fbabcd11f74ce30f46796f1a504994 SHA-1: 13831206af7260fe76995de589722fc05178c57f SHA-256: 33d30125b0311af5d990c7244b459c44c817e02f9b7596406e71ca64abe14c34
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM indicates the document contains a large number of external links, with the primary malicious URL being trafffffe.ru. This suggests the document is designed to direct users to potentially harmful websites, likely for phishing or to download further malicious content.

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://trafffe.ru/123?utm_term=no+me+doy+por+vencido+letra PDF link annotation
    • https://ruwuragawani.weebly.com/uploads/1/3/4/3/134383911/tilaxizevuf.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/ce691a81-44d9-40fe-9395-a8eedc8931df/lost_boy_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f173f9866f3fd2ede135/t/5fceef0905f6f278074ce73c/1607397131704/parental_control_apps_free_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/oz_follow_the_yellow_brick_road_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/62165130348.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f3e1bf71053ccb1d777a/t/5fc730ac2ac13f1ee9b6561e/1606889645044/15556702213.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5184e1c8c7413144d0b9f/t/5fcaa06825df3404b63e8c27/1607114862036/dilojaj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2c57848ba205d187778/t/5fc1195a2dd96f59181668ca/1606490458849/resekilekivun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0879da3bf4b14aba759f2/t/5fc0d7a6f3de5e49b583fc0b/1606473639121/80734284296.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/pizowolo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c05eb8467722f1ec93c2/t/5fc51927e6d49a06bb34e1d3/1606752552931/82250141533.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceedf01d0df60ade607724/t/5fd14a44a3ae4c72e4b9e6cf/1607551558682/snake_zone_worm_io_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/susigokixi.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB56E 5172 bytes
SHA-256: 2c385fe37e7535f91946e21076fc0db6d92efc3eac947479cf99210772054ca6
font_01_sfnt_off0000c6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FF 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0000d262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD262 10428 bytes
SHA-256: babe1c58f0e722cd47dd8679082940721a889a5a021b13a1fbf6bd92036f4432

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