Malicious PDF — malware analysis report

Static analysis result for SHA-256 6156e8bf212bcdc0…

MALICIOUS

PDF

83.1 KB Created: 2021-03-26 04:25:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 181aac46f9fe671f4e50bb687c154a40 SHA-1: 2e7dbb716cc511e7f24401cfd44b16f0d1148679 SHA-256: 6156e8bf212bcdc07b57e286fbac27f5c555ef48009ae1c6e32896a8aa3ea595
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 0.9996

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://jottigo.ru/award?keyword=disinhibited+social+engagement+disorder+dsm+5+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5fec6935acfc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390681/normal_603a6890eb07f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374380/normal_6006a3452fa25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449193/normal_5ff6b3c3bf7e2.pdfIn PDF document text
    • http://pikogoxo.iblogger.org/xivifumanod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5fc7da31aba87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463262/normal_60011cddf4132.pdfIn PDF document text
    • https://kotevopokevunab.weebly.com/uploads/1/3/4/5/134590751/bivasujo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393362/normal_5fe0235d7f502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444856/normal_602b40db01378.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366008/normal_5fc725ddc8212.pdfIn PDF document text
    • https://bejejedagaf.weebly.com/uploads/1/3/4/8/134862385/bedekiguforerapeni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://02aee961-309f-4c8b-9790-08f12c26706e.filesusr.com/ugd/8321db_0d1c7747ad654f7e9a6cff627ff4e529.pdf?index=trueIn PDF document text
    • http://kezadovimitaw.rf.gd/tax_on_reportable_employer_superannuation_contributions.pdfIn PDF document text
    • http://vilasatexovoxe.epizy.com/79913816200.pdfIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_6b4b4911d29e4087b4c31cecfacdfef2.pdf?index=trueIn PDF document text
    • https://033f1a72-e514-447f-b44b-9d234b37386c.filesusr.com/ugd/f05202_681c1d9f69904b27ab2cc118a4602d18.pdf?index=trueIn PDF document text
    • https://01ff271a-2d66-4e22-ac0f-a796646d2f56.filesusr.com/ugd/8d93e9_6abcde88510c40d580e76a5f7afbb0d6.pdf?index=trueIn PDF document text
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_7111bde9d2fc4701ac0c502cb228b233.pdf?index=trueIn PDF document text
    • https://318abaa7-a496-4882-a5ef-186b1d719b20.filesusr.com/ugd/ff2e65_95383fc530ac4b7eb0ced379c2769396.pdf?index=trueIn PDF document text
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_779718e0abb346b88e7647be8155c18d.pdf?index=trueIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_317d4d64beee41a2a78d735439cd96d3.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_off00010621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10621 5832 bytes
SHA-256: 69981d5cf0a0da308bffd47e3e4e59e566798054400ce03300638fa7db015a57
font_01_sfnt_off000119d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D3 10816 bytes
SHA-256: ec92fad994ab904ff51ca4dd0c5e851381d13346df4c4e8a8c300ebac8600e46

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