Malicious PDF — malware analysis report

Static analysis result for SHA-256 27af2c4bfef1bab4…

MALICIOUS

PDF

90.3 KB Created: 2021-03-25 14:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 00ad565b1406dfd5aec6637753a6ebb7 SHA-1: a7aafffd1077912fb5524cea6de9e5a072ff0d98 SHA-256: 27af2c4bfef1bab490a43c9913b24442595879b6bc5a12bbeb5cc45e80b49c8d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain, indicating a potential phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=endless+frontier+airship+luck PDF link annotation
    • http://netekepipavosis.sportsontheweb.net/82253889104.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/edittext_with_search_icon_android.pdfIn PDF document text
    • http://rekilafemet.iblogger.org/wudezejuma.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/roman_numeral_worksheets_year_4.pdfIn PDF document text
    • http://filozajerezabi.getenjoyment.net/89156088534.pdfIn PDF document text
    • http://paxosij.mygamesonline.org/how_to_read_financial_statements_for_investing.pdfIn PDF document text
    • http://wudebakafepi.mypressonline.com/ladokumuvi.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/45767777733.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/mefonevimimix/84484401212.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/pimas.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/anari_full_movie_free_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/87478794983.pdfIn PDF document text
    • https://9dd02728-8b0e-4c16-8a5b-31b14a6ec887.filesusr.com/ugd/d8c3ed_336f9e45ebac43b3bc86828f0a0a58ca.pdf?index=trueIn PDF document text
    • http://luvetux.myartsonline.com/xupemetidazis.pdfIn PDF document text
    • http://kusababi.onlinewebshop.net/xadojigok.pdfIn PDF document text
    • https://331e17ce-4321-42a7-89aa-067eaa3daeeb.filesusr.com/ugd/6576ad_70ae6bfbe071404198a312f8f5739233.pdf?index=trueIn PDF document text
    • http://zonizuziguzapi.rf.gd/87858453666.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/how_to_write_a_statistical_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/acidosis_alkalosis_cheat_sheet.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_592c2896461a4f97a7cbebe5ad56c116.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_off00012005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12005 5264 bytes
SHA-256: 4302b63663abbffde703e4f3e0493bffb41e7006511d72266171acb2f619b538
font_01_sfnt_off000131e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E8 11880 bytes
SHA-256: 28b64fed79a195bf1edeb00c0bb4d81ff2ac264d3da880cf66bd8a23562ce15a

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