Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be04a8e13cbdec0…

MALICIOUS

PDF

68.4 KB Created: 2021-02-18 18:43:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b6c10ba4649d2a6a6462e015a748a5dc SHA-1: af6c30d87214ed063b12b278e77ba3350e350879 SHA-256: 7be04a8e13cbdec0c528b38379e49c7e432871e1dd40c117e35321e949d62ff1
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/wix?keyword=nebuchadnezzar%2527s+dream+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5fd7848a33793.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387033/normal_5fefc716ce827.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/vitamin_b12_supplements_walgreensns77p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491433/normal_5fcf87cb51a52.pdfIn PDF document text
    • https://guxodobozit.weebly.com/uploads/1/3/4/3/134333536/pisefibexab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390092/normal_5ff14ab894927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451206/normal_601267ef6d4aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493916/normal_600d414f03f54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421215/normal_60028b29aefa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_60194b52e257e.pdfIn PDF document text
    • http://robinmani.site/superhero_skins_for_roblox_apkhroro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_6021ceed22d0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481423/normal_602e343427b6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484997/normal_5fef9cc6f153f.pdfIn PDF document text
    • https://jufapagemegugux.weebly.com/uploads/1/3/4/8/134860181/jonad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 8

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_off0000cd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1A 5496 bytes
SHA-256: 04c1b5cfbeb8cf376f62f830643341c9e723e20213c262cbed2d46cd270612e4
font_01_sfnt_off0000dfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC3 10864 bytes
SHA-256: 0e3b50cbfad182bd4f93c08e0ec15572d9c94b5c4b675515e08a3a91f6377d72

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