Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bba826ce01ab254…

MALICIOUS

PDF

75.7 KB Created: 2021-02-28 16:22:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6e7b2d372cf571fdb4e3d7774f67c73d SHA-1: 7e1894dc7f0323bcb6c52a100ea8177fb17509d9 SHA-256: 7bba826ce01ab254e05dd448ff7d3abe2b12a86b1eb1700735681139d006ef5b
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://baarspo.ru/award?keyword=can+i+use+text-overflow+ellipsis PDF link annotation
    • https://bexavulurezil.weebly.com/uploads/1/3/0/7/130738929/9982524.pdfIn PDF document text
    • https://doxekitonibi.weebly.com/uploads/1/3/5/3/135326555/3949350.pdfIn PDF document text
    • https://cdn.sqhk.co/fufeboxeri/4dgivhj/try_not_to_laugh_challenge_clean_2020.pdfIn PDF document text
    • https://budojidotepaso.weebly.com/uploads/1/3/5/3/135312143/fipasorebiz.pdfIn PDF document text
    • https://sosuxivi.weebly.com/uploads/1/3/6/0/136056733/1630e79f52ad3.pdfIn PDF document text
    • https://mixifomako.weebly.com/uploads/1/3/1/1/131164472/vudajedir_ketufaf_lewozapurun_xumokok.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/fokapikow/neonatal_jaundice_aap.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/division_algorithm_for_polynomials_questions_with_answers.pdfIn PDF document text
    • http://gokozir.rf.gd/seventh_day_adventist_bible_study_guide.pdfIn PDF document text
    • http://mosasawimip.epizy.com/fokokefefodoladivis.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/manualidades_para_nios_2-_3_aos.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/tosagisagosojef.pdfIn PDF document text
    • http://xekujigifur.epizy.com/26464336438.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/rizuzubijimepaf.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/rust_vs_c_performance_benchmark.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_off0000dec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC7 5052 bytes
SHA-256: a68146cb9da5890ac5951ab29c8cd0b86c84d68f7f9ea7136776f2935999fcc4
font_01_sfnt_off0000f024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF024 14976 bytes
SHA-256: 4e3fe631b432e927c1a55af1ee0e7007d52abe28c6fe9ce3b7a8356ee2c013d0