Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d5b9b7f04ee564…

MALICIOUS

PDF

66.9 KB Created: 2020-11-23 06:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 828a43fa0be039625ac26afe0fa81eb6 SHA-1: d8c6006b8d69ee4708bbeba5c0d6c1c256b922d2 SHA-256: f1d5b9b7f04ee5643e86f337677c751814f0e103d2b341f9423c951897aa4377
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 0.9997

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://traffking.ru/aws?utm_term=aosp+rom+for+redmi+note+3 PDF link annotation
    • https://bilimetib.weebly.com/uploads/1/3/4/4/134435282/cd9830c208e05.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lorewuk.pdfIn PDF document text
    • https://limikasideg.weebly.com/uploads/1/3/4/4/134446439/7262559735.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/9308642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_5f8d211bdd6b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5fad7b7e24ed2.pdfIn PDF document text
    • https://dibodowe.weebly.com/uploads/1/3/4/6/134686502/masazizat_vapux.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/5338250.pdfIn PDF document text
    • https://fukobararusi.weebly.com/uploads/1/3/4/4/134404541/af1dd84e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5fb3ec5583b59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/fantasy_football_tier_rankings_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/irs_form_1040_tax_year_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/mukipe.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_off0000cab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB7 5096 bytes
SHA-256: eab4b0afd8edf4b3feacadccc99e0cbdde59b834fd19a67c1505f5f30ccdefb9
font_01_sfnt_off0000dc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 10496 bytes
SHA-256: 38ec53d2a52ef1163f21877dca8b219adbf9e0c06799f118c49299a5ba3b161f

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