Malicious PDF — malware analysis report

Static analysis result for SHA-256 f278f687ee9c7ed4…

MALICIOUS

PDF

92.9 KB Created: 2021-03-29 05:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84ad7522c7d59908e3b6821706ddad9b SHA-1: 4491e96bba8f5dee965259b22847df99deca8657 SHA-256: f278f687ee9c7ed4d6b1deb7dff75ae78ecf9bb8aec581640f820a7f26497069
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one pointing to a suspicious domain 'soxebez.ru', suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to contain keywords related to 'Zaratustra nietzsche pdf' and application metadata, likely as a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=zaratustra+nietzsche+pdf
    • http://fly-drive.online/personal_development_plan_for_workor48k.pdf
    • http://digitalmicroteter.xyz/taboberufejizifizereleja5o0ns.pdf
    • http://jesofafisozosa.iblogger.org/62360824733.pdf
    • http://nizagose.66ghz.com/challenging_puzzle_games_android.pdf
    • https://cdn.sqhk.co/jasamomedam/hmMhjKh/viking_treasure_hunt_ks2.pdf
    • http://my-credit.info/695267232864libd.pdf
    • https://cdn.sqhk.co/wobimore/gchegdq/building_services_engineering.pdf
    • https://cdn.sqhk.co/ralapogifur/1hjdhbZ/lenovo_thinkpad_x13_review.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e39dd985-618a-4c4a-97e2-32fcd627aa40/personajes_ilustres_de_mexico_muertos.pdf
    • https://5e1449e8-5ae4-4a15-bc7a-ee23795bc964.filesusr.com/ugd/3a34a5_c4a3404526874242b79a0fbcc011e769.pdf?index=true
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_0f62c96ed9ff44df97ee260cf756e99a.pdf?index=true
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_66fd3a750e79439e96151bc4340eeff7.pdf?index=true
    • https://d920bd67-dfaf-4c99-85b0-fcb8118dfb91.filesusr.com/ugd/383849_47892b06b2274ad3abde5c930d7c1fb1.pdf?index=true
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_092d314e14ca4721872f022cad4f7960.pdf?index=true
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_3b2088dab64f4371b9d8c8252c6933ea.pdf?index=true
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_e095ca55899f42f382026488c89cc6d9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/11521e0e-c58f-4b33-8c19-57ce391be448/que_es_la_metodologia_de_la_investigacion_cientifica.pdf
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_4f3a99688c6a4ca6b016cfebe5163dd3.pdf?index=true
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_082be058b9824e108f125bea2563632c.pdf?index=true
    • https://7a512b58-7189-4bc4-8343-f643fa9054c9.filesusr.com/ugd/1e52da_ede0b191359542189022827535f9ffbd.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_off00012c56.bin
7f657de72b045d9c4147f172fad0237e3ef213882be66ba215998c4268f58d1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C56 5216 bytes
font_01_sfnt_off00013e19.bin
d70ae19425efe1dfaba6ef6f34439e637760980e8fc291ce7f39838717deeb70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E19 12432 bytes

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