Malicious PDF — malware analysis report

Static analysis result for SHA-256 87554ffc3e728825…

MALICIOUS

PDF

76.1 KB Created: 2021-03-10 03:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8787ef0bc36f05fb74d33733a0d70fea SHA-1: 89a65ff2e9cbf8603b338e5632577a6bf286bc58 SHA-256: 87554ffc3e728825a4eef642cfcb2f77b7cda41707be5fa32ba26489b89fda4f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including a link farm, and is flagged by ClamAV as a phishing trojan. The embedded URL 'https://mezovuduw.ru/wix?keyword=hooters+costume+walmart' suggests a lure to a malicious site. The presence of PDF_SEO_LINK_FARM and PDF_URI heuristics indicates a strong attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://mezovuduw.ru/wix?keyword=hooters+costume+walmart PDF link annotation
    • https://cdn.sqhk.co/basinasedu/cjhiijg/fasitiwifukokegane.pdfIn PDF document text
    • https://cdn.sqhk.co/kovajivika/c9ntShj/44695553404.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/RrFPhjp/viral_agenda_event_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/Xhf7hbK/majorulugovuravogod.pdfIn PDF document text
    • https://cdn.sqhk.co/pelopuxi/Ihh7v9c/big_bang_theory_evolution.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/wdigHhh/pipafigakakefijujij.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/5WQUhhX/sufezobolo.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/Fig9gic/download_game_hero_tycoon_mod_apk.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
    • https://s3.amazonaws.com/xijalovelokolep/acknowledgment_form_tagalog.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/40532914438.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/d_d_character_creation_guide_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/livefozobunorunonofewi.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/sonanobodixe.pdfIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_0343678197ba405480f01f76c0e5b1cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/android_message_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/40182505663.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/52296194947.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/nelelig.pdfIn PDF document text
    • https://8ed7ad90-0d0e-491f-9c15-1f6cd5a61d18.filesusr.com/ugd/f1a804_05b9476793c541d9b2767f4001195bc5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xubifupi/30698748839.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE187 4728 bytes
SHA-256: 54f33801a0cad234c4d78c2a6d2a93690062b652653a36039bd8384c6eb7822c
font_01_sfnt_off0000f1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AC 10356 bytes
SHA-256: f2762e381ec19bd43d8436654696342394f333aea63036fa91572692d2f1d130
font_02_sfnt_off0001151a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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