Malicious PDF — malware analysis report

Static analysis result for SHA-256 7baa4ba38a46c984…

MALICIOUS

PDF

68.1 KB Created: 2020-12-23 01:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: cfd4d477b46df4a0305b38597823df86 SHA-1: 3258353f7ab4ab0fa0187132afd6352ee47ca0cf SHA-256: 7baa4ba38a46c984251f6022b206bc383bbcb7a8fa73aa4afa24b0d667741355
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host multiple links, pointing towards a phishing or malware distribution scheme. The embedded URL 'https://traffnew.ru/aws?utm_term=3d+tuning+pc' is a primary indicator of this malicious activity.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=3d+tuning+pc PDF link annotation
    • https://boxuvudadutubip.weebly.com/uploads/1/3/2/6/132695546/1720d3fac5f.pdfIn PDF document text
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/212463df8b0.pdfIn PDF document text
    • https://navadajedu.weebly.com/uploads/1/3/4/6/134614390/81ec2d942dcc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5fc054c52f3df.pdfIn PDF document text
    • https://jumolemema.weebly.com/uploads/1/3/4/8/134853288/07b66dfd29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371020/normal_5fe224127f3ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc585fe27a199023ad4b484/t/5fd6292b5b1f6f7539d000ee/1607870763951/26738251013.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcacb310a8fb02f5d5db8a/t/5fdce7f4429eb3707cbc0260/1608312821910/52007434124.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dde4403f5353fd9590af/t/5fc90d35a19694193ec15d80/1607011638169/zombie_invasion_dying_light_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/397c1207-03f2-4e13-9e4c-5016a2465c15/itunes_music_apple_id.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a21f68612547ed7e37a8/t/5fc8d9c06031f4738629b11e/1606998465385/pico_island_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7555268-b3ff-4da3-a195-446e0a02d68d/age_of_wushu_dynasty_guide_2018.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc673d711f6a41984abc1e0/t/5fc719773ac9c763f4d02225/1606883705105/83988942183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9318d39-997d-4ce7-b7b0-ff35f0357ef8/guzowonefekujib.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf18d6246a5d73f4758897/t/5fd20719871f8c6e5961f76c/1607599899977/color_wheel_ideas_easy.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_off0000ce8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8C 4796 bytes
SHA-256: c8a43fb0a10f10033fe61a848b6dc3f152c3f7711eeeb065b927313e044a17b4
font_01_sfnt_off0000defb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFB 10880 bytes
SHA-256: e731587475a996457119e5a7c2d2a155b1f84083a95b84b231ea1971450266ad

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