Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a15d11a111872e0…

MALICIOUS

PDF

73.2 KB Created: 2021-03-03 21:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 53ddf6f114aacdddf87c55beb8cfb682 SHA-1: 9937992fd99b200db1a8c984220231ee3760d90a SHA-256: 2a15d11a111872e09f07aeb50475b8f19978e144b166ec494d070e878570b512
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. One prominent URL, 'https://midufefew.ru/award?keyword=the+holy+science+pdf+download', suggests a lure to download a file. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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 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://midufefew.ru/award?keyword=the+holy+science+pdf+download PDF link annotation
    • http://callup.today/sony_xbr55x850b_hdrds8h6.pdfIn PDF document text
    • http://vehicleinsusa.com/what_is_the_formula_of_pascal_triangle5je8p.pdfIn PDF document text
    • https://rinulokol.weebly.com/uploads/1/3/4/8/134868038/2625302.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490746/normal_5fe3d685d8599.pdfIn PDF document text
    • https://rapodiduwegez.weebly.com/uploads/1/3/5/3/135311990/802541.pdfIn PDF document text
    • http://easycreditscore.info/los_seores_del_narco_resumen_captulo_373grb.pdfIn PDF document text
    • https://doxugibako.weebly.com/uploads/1/3/0/7/130776338/joxowapapu-musekina.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/conexant_audio_driver_windows_10_lenovo_g580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_60158db07ac2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5fd89db1be7ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446921/normal_6021c5e8a194d.pdfIn PDF document text
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/3134488.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420036/normal_5fe15692c7b5f.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/kujapomib/jatamizema.pdfIn PDF document text
    • http://wotanuxofewaru.rf.gd/ffxiv_glazenut_guide.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/41312903806.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/financial_accounting_and_reporting_cpa.pdfIn PDF document text
    • http://meguwuzib.rf.gd/nawukifiwo.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_off0000e146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE146 5292 bytes
SHA-256: 167a35d9d398a4a9214b7b54c360b0b67997c5dad93e6592555a657b76befb25
font_01_sfnt_off0000f365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF365 10816 bytes
SHA-256: 78b2c3539baf64eb74b70da017c4c3561c763b28fe5852c419269bdb2e269375

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