Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3c7bf314bf478a…

MALICIOUS

PDF

67.4 KB Created: 2020-12-17 21:45:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: caeb4906bc4453c1e685d670afec2942 SHA-1: af83739076483d4c4773d96cf2a52f01f64ffd9f SHA-256: db3c7bf314bf478ac48e65250ec81de7e20f54c1d323a0ea1b300a6f38214bde
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/aws?utm_term=delhi+university+b+tech+admission+form PDF link annotation
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/7554208.pdfIn PDF document text
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/5d825a6f626c.pdfIn PDF document text
    • https://sevanilab.weebly.com/uploads/1/3/1/4/131437268/6940685.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fcf864aa3719f7373258f09/t/5fd1dab80f163860c7b0c0f8/1607588539676/why_does_cytosine_always_pair_with_guanine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5882a5a-7a25-4864-a0ae-951785086430/excel_macros_for_dummies.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf49cb3c02f22b9d036105/1606371787951/words_that_start_with_nim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05508d79-dbfd-4298-a8cf-b3162d8db8f1/sql_server_interview_questions_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd745bcb0228a2824d01/t/5fc542194f983757208aff58/1606763033916/8085275827.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29f5c5bcb0228a28d70dc/t/5fcbde9a1ef6d1662ffb7891/1607196314198/91631657022.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3205912facd59cebb7138/t/5fc3f8a3bc819f1cf453e566/1606678692195/jegeluwewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b2916d-a4d2-4b33-815f-afbd5f3132a6/iphone_xs_max_verizon_manual_user_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfff2111f6a4198480a438/t/5fc53f679ee0f32b87ff63fa/1606762344770/xigipififusonomoj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c0f08651a04751934446/t/5fd01895ab2d482295d1e352/1607473303902/original_pinball_machines_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41eb60c5-d25d-4637-a51e-5b729516fb22/rivon.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_off0000cb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB13 5564 bytes
SHA-256: dfea36bbcee8d84b4a27d881106282100156bbbc78133038e3963e2b7aed0fe2
font_01_sfnt_off0000dde6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE6 10296 bytes
SHA-256: 5e53d23218e3ad6f04fb2b4668175ec1b9aeee42f2b4117823a8db9efb4fd50a

Open this report in the interactive analyzer, or submit your own file for analysis.