Malicious PDF — malware analysis report

Static analysis result for SHA-256 086cff64c28335e4…

MALICIOUS

PDF

85.4 KB Created: 2021-02-20 10:06:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8bffbe76597018293920b7c5eebac26e SHA-1: ad5db52ef69d06f7d0603364afbf7b2e24be5917 SHA-256: 086cff64c28335e45358b11838c683a70aaad94e228b5827f54e80a9eac9c005
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning model assigned a high probability of maliciousness. It contains numerous embedded URLs, with a primary suspicious URL pointing to a domain associated with redirecting traffic, likely for phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to search terms, reinforcing the phishing or malicious content delivery pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://druttle.ru/strik?utm_term=lg+direct+drive+washing+machine+code+oe PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404297/normal_5fff1313773dc.pdfIn PDF document text
    • http://firstsecu-paypal.com/chronological_report_examples_ks2nk8xl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_6015ce1477363.pdfIn PDF document text
    • http://kosadezisadin.22web.org/55345579260.pdfIn PDF document text
    • http://teaapple.space/vogudamufavureukm1.pdfIn PDF document text
    • https://buxutagugumazas.weebly.com/uploads/1/3/4/0/134095839/bojimulugozuzeko.pdfIn PDF document text
    • http://vamoktin.ru/vanelitegaxodepesiv3zwd.pdfIn PDF document text
    • http://damvglaz0.xyz/sony_dav-tz140_5.1_channel_home_theatre_system_300wm5wk1.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/setaxilitozuko/lokozebesuvifabumaziso.pdfIn PDF document text
    • http://zitagarutotegiv.rf.gd/dash_diet_foods_list_for_high_blood_pressure.pdfIn PDF document text
    • http://kuxomexepus.epizy.com/vs_code_python_black_formatter.pdfIn PDF document text
    • http://vurasoda.rf.gd/jawasaxasisunixibu.pdfIn PDF document text
    • http://derizarage.epizy.com/68365283373.pdfIn PDF document text
    • http://mutidulofof.epizy.com/53402601018.pdfIn PDF document text
    • http://basaximowaj.rf.gd/having_you_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/dances_with_wolves_study_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF6 5416 bytes
SHA-256: 58bb6c445fd63b4128ab70e5243000f508479d42e7ff5e8b33ab166bbbee27e5
font_01_sfnt_off00010e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E51 10728 bytes
SHA-256: b38724d1572f98f192ad034773fa137d0068323177e4b04306874a09582a87b7
font_02_sfnt_off000132f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F0 16148 bytes
SHA-256: 64f21e55c2f29c6f605e8f9fd96e7f7b34f9b4a26fdc717ddead948457370e3b

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