Malicious PDF — malware analysis report

Static analysis result for SHA-256 64775a863dd64a40…

MALICIOUS

PDF

76.2 KB Created: 2021-03-30 16:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 07d051079f9e949efc9b512d7be4bb6a SHA-1: a368a29c3e2149ef99e4b18aa3b195985d8c9268 SHA-256: 64775a863dd64a40d26a3df85e5e9e67dd58aba676d6c49561913c6ce075785f
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be related to search terms, further supporting the phishing or SEO manipulation lure. No scripts were extracted, but the presence of numerous external URLs points towards a redirection or download mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/wix?keyword=rhythm+heaven+fever+rom+iso PDF link annotation
    • http://worameruvejaka.mywebcommunity.org/ravpower_fast_wireless_charger_stand.pdfIn PDF document text
    • https://vesixogis.weebly.com/uploads/1/3/4/8/134863987/3811dfab98.pdfIn PDF document text
    • https://lepitedow.weebly.com/uploads/1/3/4/8/134885181/kazesezaxeb.pdfIn PDF document text
    • https://kusafowagu.weebly.com/uploads/1/3/1/8/131871480/7196000c8.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/5367116.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/iAbAb6m/video_player_vlc_media_player.pdfIn PDF document text
    • https://dezilitew.weebly.com/uploads/1/3/4/7/134728488/4078157.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://vinezizonevo.weebly.com/uploads/1/3/4/3/134320549/fiverovajolemiv-zisos-duzizu.pdfIn PDF document text
    • http://fazurusitu.getenjoyment.net/lizakavag.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/james_baldwin_quotes_on_identityylgoc.pdfIn PDF document text
    • https://sokijolixorinus.weebly.com/uploads/1/3/1/1/131163896/6221488.pdfIn PDF document text
    • http://xofitazuregokud.mywebcommunity.org/jorerupekizujur.pdfIn PDF document text
    • http://am-sound.ru/magic_tile_piano_tiles_onlinexvsfd.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/42375930584.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/igThdsh/winter_warmer_beer_extract_recipe.pdfIn PDF document text
    • https://wepusiviji.weebly.com/uploads/1/3/4/6/134661614/6533878.pdfIn PDF document text
    • http://vigastlens.xyz/fe_review_manual_rapid_preparation_for_the_fundamentals_of_engineering_exam_3rd_edmuvm0.pdfIn PDF document text
    • http://tamawasobo.sportsontheweb.net/bromazepam_6mg_bula.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/9hcljjX/11137276450.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/jagzlhj/lovidixenadewapamomizu.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/ririgegowiretijokojuwuyg4mo.pdfIn PDF document text
    • https://cdn.sqhk.co/rekosiseweno/PhjJjhk/call_me_emperor_facebook_login_error.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_0d5475f3ea524c5d84533bd18ca30a59.pdf?index=trueIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_ece884e353a04710b3d1bf35b8e621f7.pdf?index=trueIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_746a4eb01a2b41679332ec928550980c.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED19 5144 bytes
SHA-256: 765bf978ac84b82048dcf9a2b890489a24d2ae3a7fa719c06dcd373eb405a3f9
font_01_sfnt_off0000fe80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE80 10796 bytes
SHA-256: 390402dfac1aecc0d226ccc023256e0144c11d60d599a2c264980b94f5914dae

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