Malicious PDF — malware analysis report

Static analysis result for SHA-256 80675efd2d071441…

MALICIOUS

PDF

77.5 KB Created: 2021-04-08 05:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc1331d3dcbed676bc41b4c80fd6b366 SHA-1: e158caa5def8dcb727fb29d1c6c6218e04ad82b0 SHA-256: 80675efd2d071441416b5ce5c2c6be52dedd04f16607da5d17d3399c8d2ef44a
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a PDF link farm. The primary malicious URL identified is 'soxebez.ru'. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://soxebez.ru/123?utm_term=irrigation+pipeline+design+manual
    • http://suzofovolavuk.scienceontheweb.net/fukiwesigewizamesamixep.pdf
    • https://cdn-cms.f-static.net/uploads/4387922/normal_60552135b5146.pdf
    • https://static.s123-cdn-static.com/uploads/4410027/normal_60097a6aed7d3.pdf
    • http://mudikovarew.mygamesonline.org/is_the_5th_wave_a_true_story.pdf
    • https://cdn-cms.f-static.net/uploads/4401515/normal_605921a4a9ac6.pdf
    • https://cdn-cms.f-static.net/uploads/4366949/normal_601076bb17e0d.pdf
    • http://mitutepoka.medianewsonline.com/kobelewazikolaxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_5f7e2a0004484cedaf52fde228c7e79b.pdf?index=true
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_5481ef0ff3cc49f59febddf88bfd76da.pdf?index=true
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_fca374ee83ff48eb9039c720b33c2c06.pdf?index=true
    • https://0f7a2101-273c-4f7f-b1fd-079d1ad923c1.filesusr.com/ugd/a7ea6f_e16a3e72104a4ae8acaff658791f31d9.pdf?index=true
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_562cbef4a5434caa96a91a6872b00b4c.pdf?index=true
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_68caac4b4cdc45d39f6e5fb00498262e.pdf?index=true
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_acf940d8497f4a97812a3e9f56c39eab.pdf?index=true
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_7c6493ea560e4fbf8d0f7dd7c3574c9d.pdf?index=true
    • https://s3.amazonaws.com/wolawatin/feluborireze.pdf
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_b9dbfa3abdd54f7292a681ae210b0a7b.pdf?index=true
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_f1ed1e23b004497e931b02ccece81397.pdf?index=true
    • https://s3.amazonaws.com/jovekus/how_long_was_jaycee_lee_dugard_missing.pdf
    • https://3ced707c-20bd-49bb-93f1-edb15be4e391.filesusr.com/ugd/e90305_2a4655342ac844e8a6caa673af2bd37f.pdf?index=true
    • https://s3.amazonaws.com/sinamozagemoger/15679981324.pdf
    • https://acbe2b0b-ee64-4eea-b0ce-372b1aa9cc7a.filesusr.com/ugd/4bcc67_e36e1a1ee0384c17bde90f0aea3f461a.pdf?index=true
    • http://zavulelobawabi.onlinewebshop.net/caballo_de_troya_5_libros_gratis.pdf
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_37b2edc6d470440ea4b0cf8f9b5ab883.pdf?index=true
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_8ee2085056c04cc594c0f744e59af46f.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f13a.bin
bf9709ca1b1af05c456304729ab5bba87ab48e27aac4441d80503d558c45ff99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF13A 5216 bytes
font_01_sfnt_off000102e1.bin
26ce4ecb6d30f1f65a15a1cf9a5df5b4d6ae26f462a835d571254089d6cc0ab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102E1 11044 bytes

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