Malicious PDF — malware analysis report

Static analysis result for SHA-256 b07dda0a3e488033…

MALICIOUS

PDF

76.1 KB Created: 2021-05-17 12:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c8b4ada9dbbcbd1b36389d6ef9e6f388 SHA-1: bafd5645df1f20a9a93343aea5fae530a2929064 SHA-256: b07dda0a3e48803384e253155fa222e79d0d721b34b70fa54c99b76e636510a9
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are obfuscated or lead to other PDFs, suggesting a link farm or redirection mechanism. The primary malicious URL identified is https://soxebez.ru/strik, which is likely part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/strik?utm_term=bge+peak+rewards+thermostat+not+working PDF link annotation
    • https://rarezeromodon.weebly.com/uploads/1/3/0/8/130874170/rexefiborafaw.pdfIn PDF document text
    • https://cdn.sqhk.co/fejovuwov/c4ijl2b/rizub.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/udifiga/kung_fury_2015_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/jhFYiiQ/islands_in_the_stream_song.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/jdF5Ngi/chatham_vet_hospital.pdfIn PDF document text
    • https://tixusevonatafix.weebly.com/uploads/1/3/4/6/134611731/jivevopixu_venapupuji_kenovasewoma.pdfIn PDF document text
    • https://jesuzexujugom.weebly.com/uploads/1/3/0/7/130776612/diviti.pdfIn PDF document text
    • https://fanaraligo.weebly.com/uploads/1/3/4/6/134620410/ziferufex.pdfIn PDF document text
    • https://lemirupuzomive.weebly.com/uploads/1/3/2/8/132814022/mivizagipanedi.pdfIn PDF document text
    • https://nopubogap.weebly.com/uploads/1/3/4/6/134667077/baredawofafig.pdfIn PDF document text
    • https://gewujamagig.weebly.com/uploads/1/3/5/3/135339218/5096250.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/79527523878.pdfIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_c7efa0ae7c2944699cbe693ede5f3299.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vovuzize/xotafukovori.pdfIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_14b8442d04444160a5611ac1b1165b15.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujapu/bharat_ka_samvidhan_book_app.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/do_you_capitalize_position_titles_in_a_cover_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/diary_of_a_wimpy_kid_box_set_-_10_books.pdfIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_1688952fd5ee4529b61e22dc28f3141f.pdf?index=trueIn PDF document text
    • https://19004eff-8f5e-45b0-b15a-9fbdbd99e39d.filesusr.com/ugd/578ea4_1d7296bab6b144959b2a22efc31cce66.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mefovu/bose_universal_remote_codes_lg_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/gurarulakerokapixirugin.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/dulusogimodas.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_b634d0aa3073442d9e9d339f9acd2151.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasawe/49425355466.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 5548 bytes
SHA-256: d29a6f49221aec57de55c32f4ad3d10c3c0e73f78a62ff50c46e7b6f7cf9ba38
font_01_sfnt_off0000fc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3B 11272 bytes
SHA-256: 50fbbc02221fe58babf7b0af9aaf44f97628e9a80565709192a1d827845b9aff

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