Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa432047b34f332…

MALICIOUS

PDF

74.1 KB Created: 2021-01-24 15:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7284fbabae4c2382a3e796f175eef375 SHA-1: 7729acb069f3928f09b8b6d39d104da7fd704bdb SHA-256: 6fa432047b34f33247fc4951c0790913332e2e731bfda16ea5f75bcf6bf5f85d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains multiple embedded URLs, including one pointing to 'jottigo.ru' which is associated with a link farm on disposable hosting. The presence of these URLs and the overall detection suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further malware.

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://jottigo.ru/123?utm_term=mike+graham+wrestler PDF link annotation
    • http://nukuxarigikuxez.iblogger.org/bootstrap_4_dashboard_theme.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379726/normal_5fcab95824f08.pdfIn PDF document text
    • http://brandframeb.com/vebibedetubitajelijom17k5.pdfIn PDF document text
    • http://freshka.fun/war_conqueror_4_mod_apkfqbkk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469630/normal_5fdeca61eefc0.pdfIn PDF document text
    • http://feziweninepiv.iblogger.org/46930622133.pdfIn PDF document text
    • https://laximazerafa.weebly.com/uploads/1/3/4/2/134235816/4e86c9efcc08e.pdfIn PDF document text
    • http://golivexi.22web.org/chords_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417525/normal_5fecce8b27a40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kexabomatifub.epizy.com/curriculum_vitae_latex_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/rimsky_korsakov_trombone_concerto_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/mimagubur.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_off0000e1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C1 5260 bytes
SHA-256: fc499b74e43a6904032fc41ae488e192bda773e58a0e3e08fe141ebe7c65b475
font_01_sfnt_off0000f399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF399 11420 bytes
SHA-256: 4572fd45e1fa03183a0c695a171c3e678c698e6d58f2fc35baf59a8e0e459fd2

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