Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a50a4dfd331d1b…

MALICIOUS

PDF

68.7 KB Created: 2020-12-08 22:57:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: cccaeddeb5daff9a819fa36356fb4554 SHA-1: d180c41f6e5c832415b95a6a77a2eaac88276bf1 SHA-256: a1a50a4dfd331d1bad9782dc5b611048474119def9efa1e8eb2cc8e3e58327aa
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 0.9997

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://trafffi.ru/strik?utm_term=lush+essential+oils+handbook PDF link annotation
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/4665099.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/zijuzino-dotiwerosap-xigapala-tibuxen.pdfIn PDF document text
    • https://pozujejax.weebly.com/uploads/1/3/4/6/134679154/f4e4462.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/18635540-c722-49d3-913f-d82254b8dd5a/balancing_equations_worksheet_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ae0893-f269-4da8-9c79-e9f8938afd6b/zuwepedovuf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c2242122570d58fd9091/t/5fcf58db68c18617d410019d/1607424220301/digital_marketing_agency_nyc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d14f00f2-8ee2-4f66-8229-ef59a7cbe896/kilomejaberiviwaga.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc518baf9866f3fd2ef1438/t/5fc97a2a9901aa382b381de1/1607039532122/bad_piggies_2-_26.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11362403f5353fd96c027/t/5fc5a5d161e25426e1fa76df/1606788562336/zeluno.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11b742e34347c70454783/t/5fc6b92b0623334b0c471c62/1606859052454/pamusujolaguge.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc674b111f6a41984abc95a/t/5fc752d2ad3e64119244083b/1606898386326/electricity_and_water_services.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53589df132613bbd9bff0/t/5fc6bbcd0623334b0c47db70/1606859726986/45359619249.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_off0000d495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD495 4960 bytes
SHA-256: 62b67f42bf3c8dbb55e84237be71801bbed75c8bdac7687719a9ee1d920f2544
font_01_sfnt_off0000e56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56D 9644 bytes
SHA-256: 958861ea892dba4c3532d4e307738af370c26492643293c12baf5bed284d8958

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