Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ae6792240034af…

MALICIOUS

PDF

77.1 KB Created: 2021-03-07 11:29:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5efd7df06de59d4c2930fe9370f908c5 SHA-1: 872c3019924bd65407744030b55725e85e04f163 SHA-256: e7ae6792240034afbc381bbca54d9394d3e967b032fc306115dbc4dbee665045
126 Risk Score

Malware Insights

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

This PDF document was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The primary URL, 'https://botokaw.ru/strik?utm_term=how+do+you+clean+a+breathing+machine', appears to be a phishing lure disguised as a search result. No scripts were extracted, but the PDF structure and embedded URLs indicate a phishing or malicious redirection attempt.

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 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://botokaw.ru/strik?utm_term=how+do+you+clean+a+breathing+machine PDF link annotation
    • https://zedabobosarafon.weebly.com/uploads/1/3/0/8/130813357/c1e2afee6.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/Ijd3Thc/wivominesudunesib.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/iXM1PI6/77605201578.pdfIn PDF document text
    • https://kogababofaf.weebly.com/uploads/1/3/0/9/130969162/563bd94264f06e.pdfIn PDF document text
    • http://kurekarer.22web.org/31942277219.pdfIn PDF document text
    • http://zatuzosej.iblogger.org/naming_organic_compounds_with_functional_groups_worksheet.pdfIn PDF document text
    • https://vuvoxuwamulixa.weebly.com/uploads/1/3/0/7/130739220/borulomuvoz.pdfIn PDF document text
    • https://rixemovupel.weebly.com/uploads/1/3/1/6/131606965/rijetino.pdfIn PDF document text
    • https://cdn.sqhk.co/tobamozusaj/qh67icD/6753863927.pdfIn PDF document text
    • http://lurodug.iblogger.org/xularuruz.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://uploads.strikinglycdn.com/files/3dbc55de-aca3-4a26-9f34-72e13eef2c46/78725335000.pdfIn PDF document text
    • http://wereguvepowu.epizy.com/53350343889.pdfIn PDF document text
    • http://zovitox.epizy.com/fesuvixizemubek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/291fc2f4-8325-41b8-8e64-5566db73c91d/tibetan_dream_yoga_book.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/wixusalizozipupigegovu.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/94427711658.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/irreplaceable_you_parent_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba00095c-00f0-4db9-a649-23cd551376e4/11060140780.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_off0000e36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36F 5352 bytes
SHA-256: 5432694b6a702bb5b528abacb567fc14262b969647bd70cd6bb44e2a9c77a995
font_01_sfnt_off0000f585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF585 10472 bytes
SHA-256: 41b54207a388aca3e9675310fb97efa87b99856acd308b8cf943235ddf9f79af
font_02_sfnt_off0001194c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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