Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1580612b038730a…

MALICIOUS

PDF

74.4 KB Created: 2021-01-05 20:13:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4fbaf8936571b15a3183bd62426f41ab SHA-1: 1eccf5f92eea4933667f6a74083a602b103415d0 SHA-256: a1580612b038730a62e1dfe4c5d31939370df42070b9d8eb8f90c5c589b3ce14
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://trafffe.ru/123?utm_term=15+%252A+3 PDF link annotation
    • https://vudepupebowazuk.weebly.com/uploads/1/3/4/4/134472779/6274886.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/gisanilimifumivuzap.pdfIn PDF document text
    • https://femuketidoxesi.weebly.com/uploads/1/3/3/9/133997502/3850969.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/mexekodabagaxorabid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489730/normal_5feedd9295d8b.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/ieDVijt/real_car_extreme_driving_simulator_2020.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/a67ca9dd-6e25-4cc0-8d67-ae93af97ef78/wivazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad11129-4e32-4408-8dd5-1c76ff04f875/rojebopofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f6102e-5adb-4156-9f16-5652cfe2c295/xedowefapowevojefit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1f59ef-94f9-4eab-a113-b44334c408a9/welowinuposoxok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/048e26ee-eedf-4b1f-a206-ae3def99c536/53832887014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/455365b5-ba85-49af-a56f-7c857a656584/tiefling_eye_colors.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 4476 bytes
SHA-256: 0f42dc6d3b746ce5f208b2cc243a126826ea08171476d1ecb623adf1bdca2fb1
font_01_sfnt_off0000f66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66C 11548 bytes
SHA-256: efa6e8b428de36ca0ab4f55967d5aa00407ce483b22e975e1df5d779aeb32e76

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