Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc11393e6becaa6b…

MALICIOUS

PDF

77.9 KB Created: 2021-05-25 17:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 44d4dcb99463557225d24db2468f7263 SHA-1: b72673b939a6dbf73725adbb0202f3b026f23bf8 SHA-256: bc11393e6becaa6b331884699691678517bebdcf9be34b94189e09a045f240ec
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://midufefew.ru/strik?utm_term=filmorago+-+free+video+editor+pro+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382414/normal_6025b25ecd850.pdfIn PDF document text
    • https://vutepunuvo.weebly.com/uploads/1/3/1/6/131637517/bolixabusenu-zariparirav-nazenodojebag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_603a2182bd39a.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/fdf238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477163/normal_605fbe4e57072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408596/normal_601a56bbcc628.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393356/normal_6031e2cd9ffc2.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/mubemutolewe/aneurisma_fusiforme_da_aorta_toracica_ascendente.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/facial_expressions_test_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/sepepone.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/62161538893.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/logic_copi.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/virus_cleaner_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/what_is_a_tropical_wet_climate.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/famebuvig.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/the_fourteenth_goldfish_chapter_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/asbog_fundamentals_of_geology_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/beethoven_sonata_14_3rd_movement.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/how_to_do_military_dating.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/1716062821.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/tejun.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_off0000efb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 5292 bytes
SHA-256: cfb9aa2923ac6b0df0f49c8142348efa171f286f91ecff34786f97519dd9124f
font_01_sfnt_off000101b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B5 12308 bytes
SHA-256: 52700ce33f1d6830781f7a722cd65a5ccbf93514494c1697d938e6ae8950ef74

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