Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9edd11664f0c0cd…

MALICIOUS

PDF

73.2 KB Created: 2021-03-23 02:53:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 831f6e5d4e0afd83b41f87ba6d04fed4 SHA-1: 160ee047384d9f15271e92855c8dddf3176e657f SHA-256: d9edd11664f0c0cdec70ad3789dbc9a0fefce3df9aed3a94b233bbc99c345602
186 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 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/wix?keyword=bandar+bola+online+terpercaya PDF link annotation
    • https://xukizawumu.weebly.com/uploads/1/3/1/3/131380236/nalulojisu.pdfIn PDF document text
    • https://werudugin.weebly.com/uploads/1/3/0/8/130873895/lilarefiponibija.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450502/normal_5fe615d778f3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489244/normal_6014cc8ae8b59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487419/normal_601816b4e0a17.pdfIn PDF document text
    • https://namowabe.weebly.com/uploads/1/3/4/0/134000139/suzose_nunajatad_suzof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402289/normal_604509e169b7a.pdfIn PDF document text
    • https://pizeposinejuxow.weebly.com/uploads/1/3/2/6/132695365/8590734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482405/normal_5fdb316e06298.pdfIn PDF document text
    • https://kupujusurigov.weebly.com/uploads/1/3/4/4/134471221/0f5ef34ad9b7c9.pdfIn PDF document text
    • https://sijudunewofas.weebly.com/uploads/1/3/4/6/134696620/d9a20c475ff77.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/ff255d2e-5f08-4c52-af29-6c6526d0895c/comtrend_default_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac197ab5-4fd3-45ef-add6-e0fa7440a13d/nelumetosejujugojag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa660be7-1b79-4f6e-bc37-15ff30d0191a/89481692354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa5697e-cfd3-4839-9caa-3ed9dd89b08c/58102529648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a281b6-e4c5-4f5d-8572-5f16eaa456af/how_many_days_till_easter_2016_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ea61c0-763e-4740-b000-843edbf0bc94/sumuzasavom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b9f688-0f1e-4eb5-9d0e-ad28f4cc553a/9031248363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd38409f-7d60-4cc1-9fa9-a1e87a72cbaa/ximapisilixanifudobodegud.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_off0000e279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE279 5180 bytes
SHA-256: 71872adf0d27205d92c5091aa8192bd779fc19aa1e88936e4d2eb058ea24b46d
font_01_sfnt_off0000f42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42A 10448 bytes
SHA-256: abe5e623e2436409993d9bf2bc36e23c33587bdcf383434ce0465db82775ea83

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