Malicious PDF — malware analysis report

Static analysis result for SHA-256 418dbf45cc1e59d0…

MALICIOUS

PDF

71.7 KB Created: 2021-05-05 14:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be795bc416f8ccfca877a8fe7a24edf0 SHA-1: 7c0914e6344e28e118357b3658f205621181f37e SHA-256: 418dbf45cc1e59d02aecefe89c8da40686383b063ff4aa1aeb4355d789f21112
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. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with the primary suspicious URL being https://lozipotod.ru/strik. This indicates a phishing or content-farming attack pattern designed to redirect users to potentially harmful websites.

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-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://lozipotod.ru/strik?utm_term=what+is+literal+meaning+of+islam
    • https://cdn-cms.f-static.net/uploads/4484126/normal_60640d6a1359c.pdf
    • https://cdn.sqhk.co/xolafunodo/Uidhggf/bird_dog_exercise_benefits.pdf
    • http://istlan.space/5236493555nnjen.pdf
    • https://nadagedo.weebly.com/uploads/1/3/1/8/131858166/guxorazu-tolufozavobol.pdf
    • https://cdn.sqhk.co/dupetodim/jiQSjba/data_exploration_project_ideas.pdf
    • https://static.s123-cdn-static.com/uploads/4443814/normal_6003756db237e.pdf
    • https://cdn.sqhk.co/luwesefizi/Zhhihia/caller_id_call_recorder_spam_blocking_id_locator.pdf
    • https://cdn-cms.f-static.net/uploads/4421330/normal_60642c716138d.pdf
    • https://jifurutirijiguj.weebly.com/uploads/1/3/4/5/134528482/pokefeb.pdf
    • http://myfavoritesun.xyz/pepirafonuvuwcn8tu.pdf
    • https://posokirotol.weebly.com/uploads/1/3/2/8/132814476/8508309.pdf
    • https://cdn.sqhk.co/livukigelo/2phVhjr/vupizuwapemelifurez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://48b7024d-7414-4593-b44d-ed892b96ad15.filesusr.com/ugd/3e5db3_027d40d24fab49dba45cec882cddafaf.pdf?index=true
    • https://s3.amazonaws.com/lodazojamuva/navegador_baidu_browser.pdf
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_59f9fc693a5c4b37b2a6a19921875fb7.pdf?index=true
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_1cb15b88b25d4b0388fdd28d0d2aafd6.pdf?index=true
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_d05627bf86aa4b9ab0270013f047276d.pdf?index=true
    • https://s3.amazonaws.com/jefazaxal/2006_bmw_330i_led_headlight_bulb.pdf
    • 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_off0000db47.bin
cb541f3ad8d13106bf4d19294d4ced3be837b0530f20d3607a2118a0d8b80bd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB47 5196 bytes
font_01_sfnt_off0000ecd3.bin
b27eb9764016776a10c3b3a4cc796dff5054997904d2aa67ec2a5123b5b43fec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECD3 10896 bytes

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