Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf8a38a3fb5fcb55…

MALICIOUS

PDF

82.2 KB Created: 2021-03-19 23:10:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9b385c752e8315e6c24504b11c2271b1 SHA-1: 152541ac273253d3a942add596dcd6afa3196ab5 SHA-256: bf8a38a3fb5fcb55443b02fa950285e5c8ad1ce6ddeed30b2a3eaf59e0794953
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/wix?keyword=gta+5+manual+transmission PDF link annotation
    • http://dfahsdfgjsfg.online/checklist_app_for_mac_freerdk0d.pdfIn PDF document text
    • http://ruszaimclub.ru/espaol_segundo_grado_lecturas3yxbl.pdfIn PDF document text
    • http://dayzcommunity.info/kobefurutozup7hkzx.pdfIn PDF document text
    • http://vkrowl.com/45935587214099o7.pdfIn PDF document text
    • http://zoneeuro.pro/zewuperosenowaxuwc5bpf.pdfIn PDF document text
    • http://timurberg.ru/74450891529utehx.pdfIn PDF document text
    • https://sujabowumosof.weebly.com/uploads/1/3/1/3/131398195/846c9c9edd4.pdfIn PDF document text
    • http://gouliwer.online/taputufowibox2ut0.pdfIn PDF document text
    • http://cabinetsapp.xyz/navelawoduly45.pdfIn PDF document text
    • https://matexofetuboso.weebly.com/uploads/1/3/1/4/131453592/jedafagexetuwak.pdfIn PDF document text
    • http://wellwork.site/5543958689ysmqe.pdfIn PDF document text
    • https://vetigepar.weebly.com/uploads/1/3/5/9/135989985/589a21e09.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/wejala-bigexovo-jifatobekivu-webobemomatozor.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/821453450317oc0f.pdfIn PDF document text
    • http://2022god.com/62464106135hzksw.pdfIn PDF document text
    • https://tijesefufejeje.weebly.com/uploads/1/3/4/8/134858706/4052501.pdfIn PDF document text
    • http://erogancolumbia.site/252846580386tmmf.pdfIn PDF document text
    • https://zovakilezogavi.weebly.com/uploads/1/3/1/1/131163957/7687810.pdfIn PDF document text
    • https://gisoroweri.weebly.com/uploads/1/3/4/8/134893792/8408120.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/3128098.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zidarebuna.epizy.com/how_do_i_get_an_entry_level_job_with_no_experience.pdfIn PDF document text
    • http://gudodatu.rf.gd/90782584745.pdfIn PDF document text
    • http://poxisopepoxozo.rf.gd/ti_84_plus_ce_blue_walmart.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADE 4988 bytes
SHA-256: a750c72a83263b675ece6ca44da5a30bbec876a3c0f09a716bdfdf4d5b95d91a
font_01_sfnt_off00010bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB5 2188 bytes
SHA-256: 0cba946a1011763a5b3d0f440c704485f6d2ad2f79782fb9b8a000d9d1d112c6
font_02_sfnt_off0001157f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157F 11024 bytes
SHA-256: 36b1f53d985b920edd6a80fcfdc8aa1495f7a450929b725c49ef5b7540da21ee

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