Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b07ddbdf54cb5a…

MALICIOUS

PDF

71.6 KB Created: 2021-05-01 15:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f1379f6ade7a444f07bab8d6bbef3aa5 SHA-1: c8a67fc1ca03110ee2a93eb5032c9c9aa5315bce SHA-256: a0b07ddbdf54cb5a77b67ae98835ff43db8e176e39df535895fed5ae50e6e612
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as phishing malware by ClamAV. It contains an external URI pointing to a suspicious domain, which is likely part of a phishing campaign. Although no scripts were extracted, the PDF structure and external URL suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=serta+motion+perfect+3+king PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476011/normal_60412ada666b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404290/normal_5ff527127bbe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_6050587f4c219.pdfIn PDF document text
    • http://qwertyujg.xyz/59474237715ciekt.pdfIn PDF document text
    • http://copyright-services-us.com/seagate_pipeline_hd_2_500gbe9d40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401538/normal_5fedd676d05c4.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/dosipive/87783521036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf28a12-018b-47b5-939b-f0744d701fd6/acoustimass_10_series_v_specs.pdfIn PDF document text
    • http://mevusajilitum.rf.gd/dawil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9da91cef-5165-4529-9c36-2cc41c32f0ed/tigonopovazuziwawomimegeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec15946e-2302-4229-87c2-f445b5c23358/mopazedamitovudinibukir.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/3068718365.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/baixar_jogos_de_tiro_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa2c7627-3a77-46e0-8882-2a35f539000f/can_you_wash_your_hair_when_you_have_crochet_braids.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/weight_watchers_ultra_slim_glass_body_analyser_scale_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27ed60ef-a482-4741-9bda-5036de7c8200/osceola.k12.fl.us_employee_portal.pdfIn PDF document text
    • http://pinokogojoxajim.epizy.com/oblique_asymptotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911471f2-b47c-4af5-91a7-4d1bf94af23c/photive_speaker_not_working.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_off0000d67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67A 5456 bytes
SHA-256: feb5ae74a29a084ba4da7088f4289935c866f1a0fedf49067d8fc966656b83b4
font_01_sfnt_off0000e8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FD 11724 bytes
SHA-256: 2ffabd718bdc12b31a2dc97fbb100432e5527d605d90f7f1cdcb13fbbe618c1a

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