Malicious PDF — malware analysis report

Static analysis result for SHA-256 168ce9b4bb6ef053…

MALICIOUS

PDF

77.4 KB Created: 2021-05-07 04:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a99fae909e199a6cad5a3c623d6846cf SHA-1: de75862db1294292459b35cc43c4d7f1a6c773ab SHA-256: 168ce9b4bb6ef05352f9ee7312e19b081c0b67ac8c9ff3cbc595ddf4eb830bdb
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 0.9997

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://zajinet.ru/strik?utm_term=what+is+the+fireplace+channel+on+directv PDF link annotation
    • http://reznitskygallery.com/sipakarukazugosaclzmh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501046/normal_606d43819b30c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454425/normal_60339d8a390d7.pdfIn PDF document text
    • https://jopuwijexanubuf.weebly.com/uploads/1/3/0/8/130874501/cb40fe738e.pdfIn PDF document text
    • http://liketime.online/la_catedral_del_mar_netflix_cast9y9pe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421615/normal_6056f1bea3c0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424040/normal_5fe5677acac21.pdfIn PDF document text
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/fda966cdd7b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473632/normal_5fda50bf8743d.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/b473fc5d-00d0-4b24-a99b-3d1d651a3cd0/20705213735.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/manual_microsoft_wireless_mouse_5000.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/laser_boresight_targets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90932743-0a71-4d43-acb0-c23dc861f951/yoga_exercises_for_lower_back_pain_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/53369681089.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/nba_2018_games_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e53b201-9d9c-45e7-b0b1-6d123650f9c2/vetifi.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/oscar_et_la_dame_rose_letter_3_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ed2961b-36ec-4ffc-bba0-9f35def994d0/90526447175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4e46864-90c1-4252-9213-63006e869c95/guzomunikomu.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/govuxegubedaxaranaj.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/rekasotakajimuforatesu.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_off0000f2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AA 5316 bytes
SHA-256: 781c80921c2a1aaea55abb91b2163b2a04ec60314feb2c7731d84675bf534673
font_01_sfnt_off000104ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CA 10540 bytes
SHA-256: 4cfb6943336291cafa17b3d600161d0c657c10462eae650f8bf4045e245e4ba1

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