Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63578f8befe530e…

MALICIOUS

PDF

78.0 KB Created: 2021-02-20 10:12:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 327f4949f89d372861d2ee984b27e03b SHA-1: 5ffd0e998615dd2a0eef6805979856559823b3e7 SHA-256: c63578f8befe530e1af2b5faf368f443db1ef20d7d92765355a21010e74ade97
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The document contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm designed to redirect users. One of the primary URLs, 'https://jottigo.ru/strik?utm_term=microsoft+word+format+painter+keyboard+shortcut', appears to be a lure, attempting to trick users into clicking by referencing a common Microsoft Word feature.

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://jottigo.ru/strik?utm_term=microsoft+word+format+painter+keyboard+shortcut PDF link annotation
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/pexajidapibis_nenopopa_rijefozajiduno_nomoje.pdfIn PDF document text
    • https://gapurosudezejug.weebly.com/uploads/1/3/5/9/135965954/duperudude.pdfIn PDF document text
    • https://xukonixivuki.weebly.com/uploads/1/3/0/9/130969652/1941428.pdfIn PDF document text
    • https://posenumu.weebly.com/uploads/1/3/0/7/130776111/janofejezi_fasokajoxeseruk.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/Shghiiq/88438494528.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/bgeTHhf/universal_sound_fx_download_video_copilot.pdfIn PDF document text
    • https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/54c33c.pdfIn PDF document text
    • https://wekosidofanepa.weebly.com/uploads/1/3/2/6/132696212/e33377b.pdfIn PDF document text
    • https://vuvopovakufusoz.weebly.com/uploads/1/3/4/3/134342968/vokux.pdfIn PDF document text
    • https://nulijuvak.weebly.com/uploads/1/3/3/9/133986618/mixujesovop-zameluxudebu-tugegulixuv-memixubamo.pdfIn PDF document text
    • https://badobokitevobux.weebly.com/uploads/1/3/0/9/130969603/lawubuvilugazetis.pdfIn PDF document text
    • https://dibovasejul.weebly.com/uploads/1/3/1/0/131070518/16f661721089.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/phem7hf/vokipakujudases.pdfIn PDF document text
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/litopinizuxe_foxenazasob_xozovug_momoka.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/xelimewat/57612735261.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/aptoide_apk_for_android_2._3._6.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/wunuko.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/aliens_versus_predator_2_game.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/xakupaje.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/zibofamoxiso.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_off0000f0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 5764 bytes
SHA-256: 33f4aa7f3a15bab7ee8375b5f0781e07e968f3bf750c5265026db25d4d1d4390
font_01_sfnt_off00010461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10461 10988 bytes
SHA-256: fd6fbede6d19fdf2218405edc061f9be6f8f497e7b8c4aec2e22f9115eb663b2

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