Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57fd980e4fbaa24…

MALICIOUS

PDF

68.1 KB Created: 2021-02-14 15:31:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 95ebadc18c9842b64c72a2b3d0983163 SHA-1: 4199204acb9c55addc7f3f450ed1ddab49fd57f1 SHA-256: b57fd980e4fbaa2462be08baefb6fe12a948caff0749337a7d6303ab3488fbe3
196 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/123?utm_term=pitt+study+abroad+office+hours PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456663/normal_5fee53ba69be5.pdfIn PDF document text
    • http://ziduzuraxiralet.iblogger.org/liver_arteriovenous_malformation_radiology.pdfIn PDF document text
    • http://ferunasivagu.iblogger.org/alcatel_lucent_manual.pdfIn PDF document text
    • http://bifakibebus.iblogger.org/introduction_to_public_finance_and_taxation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403539/normal_5ffb925435c91.pdfIn PDF document text
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/pagisajuguna.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dobupefibukin.epizy.com/duribinorofozupuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/serial_dilution_questions_and_answers.pdfIn PDF document text
    • http://duzujijola.epizy.com/2020_calendar_printable_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/rugise.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/local_area_calling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/blotter_acid_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/88801739132.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/kiddo_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/34753328809.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/pogumobifa.pdfIn PDF document text
    • http://sijomowekiri.epizy.com/fasajepatusomamiraniru.pdfIn PDF document text
    • http://wasizematimom.rf.gd/87884482014.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_off0000cbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB3 5320 bytes
SHA-256: 0a4ce359f0b2805ebca58a62fc87db95e4bfc4f8487b62f30581182f356ceb4c
font_01_sfnt_off0000ddca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCA 11012 bytes
SHA-256: 3a3c4cfe55851f63ee27c0f80706a40fd4e79b78c8a9c35ebe22537e373ab496

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