Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5ca5c854c6481f…

MALICIOUS

PDF

75.3 KB Created: 2021-03-06 16:18:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 4bfda482e5e5e7129338250ff740930c SHA-1: f32fb1fa5ff1325b97d648d7686bc430bbcef77d SHA-256: 9b5ca5c854c6481fa753db7c1041783bd070a866e094a1afc16797fb677533cb
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though partially corrupted, contains text related to sunburn relief, which is likely a lure. The presence of external URIs and a link farm heuristic indicates a pattern of directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://jumiwimov.ru/strik?utm_term=o+que+fazer+para+amenizar+queimadura+de+sol PDF link annotation
    • http://fuzubijixulux.mygamesonline.org/jawir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415544/normal_5ffeb93e0cd84.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/reloading_supplies_las_vegas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460042/normal_602e0f561baad.pdfIn PDF document text
    • https://cdn.sqhk.co/purorelaz/hjigAib/animal_color_book_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/hhoaKjj/sticker_among_us_whatsapp.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/kigujukej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_600e9fcabc906.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/JmhhLX2/knife._io_juegos_friv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_5fd09f0e28510.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/gfUjeHi/ps4_simulation_games_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugituxi/dnEshh0/23074575794.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367301/normal_60062aa153eba.pdfIn PDF document text
    • https://rafopovuweke.weebly.com/uploads/1/3/2/7/132740485/bopani_dabaji_nevulegofu.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/how_to_write_a_reading_reaction_paper.pdfIn PDF document text
    • https://rodagekutav.weebly.com/uploads/1/3/5/3/135313742/2763324.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/kexamoxusinixu/machine_learning_python_github.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/the_one_thing_planner_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/adobe_pagemaker_7._0_for_mac.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_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 5392 bytes
SHA-256: 554cc421772a790b284c2331c3f275bbd61558c4c5336a501d8b546df9770668
font_01_sfnt_off0000f7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C4 12668 bytes
SHA-256: 82553a12906a021d2c5e9a2f6bd7116f3fd7cdc067017fb618f5dc7c977248df

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