Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e968329fd9e6254…

MALICIOUS

PDF

107.7 KB Created: 2021-03-16 20:18:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7fedc74b4ad2a58d9039bf0d8f12be2c SHA-1: 45a4e243a87d3e661020f534280b68fe541056ef SHA-256: 6e968329fd9e625460b79615ecc1c5e76bb0b70fd467076ed6665d06a0a26f67
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The primary purpose appears to be directing users to potentially harmful content or phishing sites through these numerous embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=brene+brown+dare+to+lead+shame+and+empathy PDF link annotation
    • https://lezafopiga.weebly.com/uploads/1/3/4/6/134628758/d0e46.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/gxjj9ic/bawezotefuvafebinajili.pdfIn PDF document text
    • https://wipemaxo.weebly.com/uploads/1/3/5/3/135345075/7944649.pdfIn PDF document text
    • https://zefugomifavo.weebly.com/uploads/1/3/6/0/136087281/jakotunoma_guwisuledorivox.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/bp3P8hj/download_game_space_gangster_2_mod_apk.pdfIn PDF document text
    • https://xejinifinedi.weebly.com/uploads/1/3/5/3/135305438/zuwifefidima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372382/normal_6027ca3eae413.pdfIn PDF document text
    • https://kiwakamumosa.weebly.com/uploads/1/3/5/9/135963193/lifobalodogaboximajo.pdfIn PDF document text
    • https://xusikezawijuxop.weebly.com/uploads/1/3/1/4/131407227/xanov-zidetaf-voder-tifegujojura.pdfIn PDF document text
    • https://vatifogogunubit.weebly.com/uploads/1/3/4/7/134725392/8384701.pdfIn PDF document text
    • https://matixibufi.weebly.com/uploads/1/3/0/8/130873880/lagedanabas.pdfIn PDF document text
    • https://doxazefeseremef.weebly.com/uploads/1/3/4/7/134764644/xutopebogovo.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/hj6MhiI/wirulegur.pdfIn PDF document text
    • https://lewobagapu.weebly.com/uploads/1/3/4/6/134666085/4ea660a02b4.pdfIn PDF document text
    • https://lafadulow.weebly.com/uploads/1/3/4/5/134591129/5871177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417139/normal_5feaf78fcc9e3.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/z8gd7ig/swtor_kommando_artillerist_guide_6._0.pdfIn PDF document text
    • https://zujujogonawanuk.weebly.com/uploads/1/3/4/8/134879196/ef3cf99f30c80.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/sodejam.pdfIn PDF document text
    • https://ligetivegivug.weebly.com/uploads/1/3/4/0/134041815/9a78f7f9390.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420745/normal_5fed10ee5ad2a.pdfIn PDF document text
    • https://vagibize.weebly.com/uploads/1/3/4/6/134618654/jenewobojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480145/normal_60198f0788a0a.pdfIn PDF document text
    • https://tozisodije.weebly.com/uploads/1/3/4/4/134486105/0433717f58cf3b.pdfIn PDF document text
    • https://kezagoguz.weebly.com/uploads/1/3/4/1/134131769/6802184.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/0gegcBp/toca_life_farm_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED5 5324 bytes
SHA-256: c4c123818f0fa5feef4fc3c3c29131274f6652d3e23cddc07e27e35aad36a796
font_01_sfnt_off000140c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C5 5020 bytes
SHA-256: b11ec1ad7246bd2c8ed8be3cad5e726717d81ddd61938d937cbfb259734563ee
font_02_sfnt_off000152b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152B8 11780 bytes
SHA-256: 82054d70d92663c814d6bbb2282ce743904e56962c47b3264b047baab6a86c70
font_03_sfnt_off00017ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AC2 16344 bytes
SHA-256: 7e0863d6dcdfe3ce59f67395a06e5e8634226e44f713773c85e494ff6d119ee1
font_04_sfnt_off0001903b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1903B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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