Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c5db0f73d00581…

MALICIOUS

PDF

84.3 KB Created: 2021-03-17 22:13:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f34230d42d20032352857e6e16f2ee85 SHA-1: d254f723f59b5d77be343fd5becddf9af4f84af4 SHA-256: 03c5db0f73d0058159a498780d3a4368ee497d96de731f0f84185045472814e1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to SEO-optimized pages, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL 'https://kuzutuzo.ru/strik?utm_term=what+is+scl-90-r' is likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=what+is+scl-90-r
    • http://xewopixomimam.22web.org/safuxiwi.pdf
    • https://cdn.sqhk.co/lawafopugu/sWljeja/pet_doctor_rockwall_hours.pdf
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/zuronuborasimoj.pdf
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/9ef6bb9.pdf
    • http://jedusajinud.mygamesonline.org/armada_corellian_conflict_rules.pdf
    • https://cdn.sqhk.co/gukituzaju/i4gdDMy/how_many_basketball_arenas_in_las_vegas_raiders.pdf
    • https://zorikibezoxima.weebly.com/uploads/1/3/1/3/131384208/00e3b7d136.pdf
    • https://vovinusowoxojik.weebly.com/uploads/1/3/4/3/134349833/107766.pdf
    • http://pubolovuwete.iblogger.org/cgegis_table_april_to_june_2020.pdf
    • https://vinifobak.weebly.com/uploads/1/3/5/2/135298549/113479.pdf
    • https://tikamujajinug.weebly.com/uploads/1/3/4/4/134467206/6d7a359a6a1877f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dasobiviwadodaj.atwebpages.com/poxogexurew.pdf
    • https://s3.amazonaws.com/kujesulad/piriformis_syndrome_exercises_spanish.pdf
    • https://s3.amazonaws.com/faxaxos/free_website_templates_for_wordpress.pdf
    • https://s3.amazonaws.com/daselex/buying_guide_macbook.pdf
    • https://s3.amazonaws.com/donarepemi/sino-_japanese_relations_interaction_logic_and_transformation.pdf
    • https://s3.amazonaws.com/jijari/98132069266.pdf
    • http://zavatuwobo.rf.gd/1456947382.pdf
    • http://zupitatip.atwebpages.com/18361012217.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf5.bin
25912a3a9446b072e09c2ac9f68043b0baed7d7e3afef0662ae362b48216a57c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF5 4684 bytes
font_01_sfnt_off0000fae7.bin
f5cd589f922b8f4a3e3d5d8d693672f76b3b601e4e72f238ee141e65f4419ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE7 11688 bytes
font_02_sfnt_off0001212d.bin
4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1212D 16060 bytes
font_03_sfnt_off000135c5.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135C5 4324 bytes

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