Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f4058f085d997e…

MALICIOUS

PDF

77.5 KB Created: 2021-03-24 02:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9afe4ebeef70c134bdf6176f779cf368 SHA-1: 54a80f678387aa13566e58c496c7a32c6e1c26a1 SHA-256: e6f4058f085d997e88c977248ff4f16d01ac7d0614613073924d5ab7f409d3ef
164 Risk Score

Malware Insights

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

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, including a link to 'xezojetit.ru', suggesting it's part of a link farm or phishing campaign. The presence of a 'Download Now' lure further supports the phishing attack pattern. No scripts were extracted, but the overall structure and URL findings point to a malicious document designed to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/wix?keyword=download+gameboid+apk+file
    • http://fakixigulidol.mywebcommunity.org/what_is_grounded_theory_analysis_in_qualitative_research.pdf
    • http://vuxilenusip.mypressonline.com/72740899070.pdf
    • http://kavakedego.scienceontheweb.net/66205296676.pdf
    • https://fenutirixe.weebly.com/uploads/1/3/4/6/134640366/bozedazazawid.pdf
    • https://cdn.sqhk.co/bojowagawire/dEfUugg/sezofibajawuxiginelowun.pdf
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/bf300e.pdf
    • http://nomenowunesazoz.scienceontheweb.net/gukazo.pdf
    • http://powajaxib.medianewsonline.com/total_quality_management_certification_courses_in_india.pdf
    • https://cdn.sqhk.co/nuduniguwufo/ijdgggd/59336004279.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_c2861816ecdc4a678e9b01d5964c7391.pdf?index=true
    • https://be8414c4-f2d5-40c6-b8a8-1a5561a1dac7.filesusr.com/ugd/a452ea_7b4c38f7ab984f9f947a2df21f3f4fd1.pdf?index=true
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_60fdaff1d9e344c68cb34afadf2c3be5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/20557dbf-e815-4d2b-8f87-95dafeda6849/how_to_get_all_endings_steins_gate.pdf
    • https://uploads.strikinglycdn.com/files/ceabcf44-a046-4431-bb5f-57311ff96591/fluke_789_case.pdf
    • https://uploads.strikinglycdn.com/files/6f686f9c-3598-4424-9e04-eec1a98919ae/craftsman_109_lathe_manual.pdf
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_a2a66f4f772d4f839a178730bb9193da.pdf?index=true
    • http://palelezugob.onlinewebshop.net/annexure_e_for_passport.pdf
    • http://gosaduzunake.myartsonline.com/bomiwugekir.pdf
    • http://fubavinexazixo.onlinewebshop.net/32290261043.pdf
    • https://uploads.strikinglycdn.com/files/f11fa6ec-ee33-4ec5-a369-c88bd93812e6/60462494647.pdf
    • https://uploads.strikinglycdn.com/files/96faf4c3-02a9-4a7e-a088-6dc9b638cd80/rinnai_r94ls_service_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e506.bin
4b0878982f74b0e27eae9148f6f8f479508f0c8d70bce0e86e74c1d41ea86d53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE506 5088 bytes
font_01_sfnt_off0000f64d.bin
20e506319b37db4330148c42ad53ef2247ee1ac83118dfb2e284b48459517e1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF64D 10588 bytes
font_02_sfnt_off00011a5d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5D 4324 bytes

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