Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ffd0002a109464…

MALICIOUS

PDF

76.8 KB Created: 2021-05-15 15:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0c7838cb5bcf559381eae27cf917d625 SHA-1: 1f8db98b0ae105d6c5957d108adfd7b27742d3dd SHA-256: 50ffd0002a10946402e155940aba8c1203573ea3a43d3bfa823668943bcfd3b7
156 Risk Score

Malware Insights

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

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 0.9998

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 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.
  • 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=price+of+flood+light+bulbs PDF link annotation
    • http://fuvidevifa.scienceontheweb.net/273730263.pdfIn PDF document text
    • https://riragipus.weebly.com/uploads/1/3/4/3/134358734/sukepekuvoz_zudagixi_resezemew.pdfIn PDF document text
    • https://pajenugemin.weebly.com/uploads/1/3/4/6/134677616/21feb36c147bfc.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/gdib4T7/vebimuvumoviz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413363/normal_5fdcffca70c26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477658/normal_6056f4cc1209e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_6009ff24b7151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475216/normal_6065712036299.pdfIn PDF document text
    • https://cdn.sqhk.co/jatizaru/gmyIngj/remeworovir.pdfIn PDF document text
    • https://cdn.sqhk.co/rabovafom/Ujebgj9/juventus_fc_new_jersey.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/1ojhjN4/70297887331.pdfIn PDF document text
    • https://jeretidaker.weebly.com/uploads/1/3/4/5/134595905/virerezodevefij-ralibezenim.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/fodose/nopumarafatutusizezuxapav.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/chatbot_database_free.pdfIn PDF document text
    • http://jadukubilelib.myartsonline.com/quantum_doctor_amit_goswami.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/ejercicios_de_caligrafia_para_primer_grado_de_primaria.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/beder_meye_josna_video.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/98998025608.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_off0000ef5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5F 5212 bytes
SHA-256: 491d85866f0b842a8264fb52bd21e83c86741510fc2b4b5f8baf898f18d28156
font_01_sfnt_off00010112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10112 10728 bytes
SHA-256: 1a48ebed67db05d353e91280949af00653ba0ec9779903df00fe811ea3c55671