Malicious PDF — malware analysis report

Static analysis result for SHA-256 a132161447f6eed6…

MALICIOUS

PDF

46.6 KB Created: 2020-03-28 06:42:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2453cfb8f2062524b0d89e9c3ac4bfb1 SHA-1: 98d2c583c64b1530329204abcaa54c309d6c2a40 SHA-256: a132161447f6eed611be572d5c42c0e427e3c17f8218d0ce6de9a619d68664cd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a deceptive title 'Resumen del libro la torre oscura 1' and is heavily laden with external links, indicating a link farm or redirection scheme. The PDF_SEO_LINK_FARM heuristic firing confirms the presence of numerous external links, with the dominant host being tahoeelectricbikerentals.com. The ML_NYX_PDF_MALICIOUS classifier also flagged this PDF with high confidence. The primary attack pattern involves directing users to a multitude of potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://visionministryaustralia.org/uploads/1/3/0/4/130435811/130435811.html#resumen+del+libro+la+torre+oscura+1
    • http://tahoeelectricbikerentals.com/uploads/1/3/0/6/130620429/kezubulejutof.pdf
    • http://lpgmhealth.com/uploads/1/3/0/6/130639714/9276058.pdf
    • http://therightthings.net/uploads/1/3/1/0/131070611/fivotalupi-gevijunageb.pdf
    • http://novaruswc.com/uploads/1/3/0/6/130639343/1f222d.pdf
    • http://debbythepearlgirl.com/uploads/1/3/0/7/130776474/zuxipidomojuxak.pdf
    • http://mydrivingschoolga.com/uploads/1/3/0/4/130488365/5416988.pdf
    • http://caddycapdesigns.com/uploads/1/3/1/3/131381614/pokamov.pdf
    • http://nirunutrition.com/uploads/1/3/0/3/130323835/876141.pdf
    • http://classicpetroleum.net/uploads/1/3/0/4/130476317/vojurunide-pexerizofet-fevazusozom.pdf
    • http://ukholidaycamps.com/uploads/1/3/0/7/130738914/wopiwujom_jabire_mojiduti.pdf
    • http://dsbhomehealthcarellc.com/uploads/1/3/0/7/130739287/9637793.pdf
    • http://taymanlaw.com/uploads/1/3/0/4/130483407/2411272.pdf
    • http://getifi.com/uploads/1/3/0/4/130476403/f5d9cd.pdf
    • http://pof-updatevoicecall.com/uploads/1/3/0/6/130621387/4bec68d6d.pdf
    • http://emagnenterprise.com/uploads/1/3/0/7/130738637/ec5bdb3a.pdf
    • http://celebrityghostwriter.net/uploads/1/3/0/6/130605010/8913127.pdf
    • http://peteandlily.com/uploads/1/3/0/6/130639943/3092565.pdf
    • http://mail.coveredbridgeharmony.org/uploads/1/3/0/2/130287842/4286327.pdf
    • http://newspinlaser.net/uploads/1/3/0/7/130776331/50ef8a2f3c3.pdf
    • http://knockoutsdesign.com/uploads/1/3/0/2/130288006/zupuxowisuje-fesabulazobe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b4d.bin
5820a17fd9d38a00dd7a9d5de1cb6785087fe2d00f4af45f10fc52c6bb5861b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4D 8872 bytes