Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8559fcf787a7b5…

MALICIOUS

PDF

78.3 KB Created: 2021-03-13 22:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34a1e99767577bc10031965650f070ba SHA-1: 082bea5c38d6f161e8b6419b09af61a546e48a64 SHA-256: ba8559fcf787a7b5fd44c53b148c339839e5a1df9fe4dc2fb07894082ba3f9b2
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classified as Pdf.Phishing.Trojan. No scripts were extracted, but the presence of numerous external URLs points towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/123?utm_term=lagu+baby+take+my+hand+cover
    • https://litufefanim.weebly.com/uploads/1/3/4/9/134901191/pefubewawovajot.pdf
    • https://fibetenozogu.weebly.com/uploads/1/3/0/8/130813768/be7f4.pdf
    • https://cdn.sqhk.co/gilubibawi/8x0hgii/nvidia_geforce_games_download.pdf
    • http://punojeboza.iblogger.org/taletenakopumoti.pdf
    • https://mokazeke.weebly.com/uploads/1/3/1/3/131384082/tewazeg-fopejosekes-jakufivo-vobofafepizu.pdf
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/tibezadutavo-wolijokolulap-kabomazapenibik.pdf
    • http://kulixebuvalafin.iblogger.org/42169969705.pdf
    • https://cdn.sqhk.co/xuxinugad/vjgfvbh/king_size_bed_sheet_measurements_in_inches.pdf
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/momigedidalu-kiberufotexe-betifez.pdf
    • https://nobiramiw.weebly.com/uploads/1/3/4/4/134403563/9398344.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/norozovijalu/budgie_mutations.pdf
    • https://s3.amazonaws.com/tabobujimo/sefigupunarewog.pdf
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_540488ada5b24ff78a13e45927328327.pdf?index=true
    • https://s3.amazonaws.com/dozore/92490116594.pdf
    • http://savuxerekeze.epizy.com/93580125437.pdf
    • http://turijebudeta.rf.gd/energy_unit_study_guide.pdf
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_0ccdf45950864a31a2e9b506df6bc722.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f37b.bin
660d90bdac2da14b34e07320aacfb688cea1dd7ee354ba6065e42f7ec89ffc39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF37B 5448 bytes
font_01_sfnt_off000105f5.bin
11b15846f0812cd86b54d7c2d62a79daef64d20585507c08f3821eb089b039c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105F5 11216 bytes

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