Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b03d1500449cbc8…

MALICIOUS

PDF

72.2 KB Created: 2021-02-20 06:28:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1f9181366801068a46a6b98ab4e57d0e SHA-1: e6b4e8c1afaa7e22f483f050d62ec2a450c08896 SHA-256: 1b03d1500449cbc893e984adaa88b5eb68f600535c4b1579c6adc355953fc09d
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=15%20minute%20full%20body%20stretch%20daily%20routine%20for%20flexibility In PDF document text
    • http://kinokaiff.space/61650512671d3cbt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474720/normal_601d3527aa450.pdfIn PDF document text
    • https://fetevemukimagon.weebly.com/uploads/1/3/4/8/134896640/7431459.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/punozoj.pdfIn PDF document text
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/jowapuxog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418993/normal_60069c442f225.pdfIn PDF document text
    • http://gitilapen.66ghz.com/acs_mandated_reporter_nyc.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/fedufiporara/times_concise_crossword_answers_911.pdfIn PDF document text
    • http://fivamoxopel.epizy.com/breastfeeding_tips_for_new_moms.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/wrong_turn_6_movie_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/apsara_pencil_information.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/multiplying_and_dividing_fractions_worksheet_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/bamopedava.pdfIn PDF document text
    • http://suwetiwojiza.rf.gd/53582802601.pdfIn PDF document text
    • http://gutefidinasat.rf.gd/lijelegudal.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_off0000dc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC11 5652 bytes
SHA-256: bbea5e85dd75d09ae7b1266077209dd7c1d7420f8d34301c0e7be37349a7579d
font_01_sfnt_off0000ef35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF35 10708 bytes
SHA-256: f49705333694089aa0606d18354ed3ee11779ca6c3e32c112547c1c1a88ff5be

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