Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d1361627e362b1…

MALICIOUS

PDF

74.3 KB Created: 2021-02-13 02:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2851d5f596b956be2f45f9b1e3a81ce6 SHA-1: 6234563e1fa1ed730333b15c1ac0d424432675f8 SHA-256: f1d1361627e362b1748ae73af480740c147f4da73920cdb83a0735b71a4df0e3
136 Risk Score

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
  • 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://maypoin.ru/wb?keyword=australia%20city%20video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422909/normal_601d7534c0948.pdfIn PDF document text
    • https://cdn.sqhk.co/devuzemalut/ggJhhjf/fall_boys_unblocked_games.pdfIn PDF document text
    • http://crawlmqyu.space/rurunozedutonuluxoboc7sf5.pdfIn PDF document text
    • http://vulgargirls.fun/648699564752lz21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_601189322dfef.pdfIn PDF document text
    • http://realnoe-obshenie.online/pink_flamingo_film_streaming_vfytrpo.pdfIn PDF document text
    • http://myirn.icu/rujudifuperibuxufujogeqzzrl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459180/normal_5ff855d230a2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380070/normal_5ff2e5d695ea0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443371/normal_60271fd31ba49.pdfIn PDF document text
    • http://crawlmqyu.space/calculus_1_worksheet_chain_rule6py13.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/liwafo/developer_options_apk_5._1._1.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/52314902130.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/gujovozegakawomamuxiges.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/dead_silence_full_movie_english_free.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_off0000e421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE421 5084 bytes
SHA-256: 64d270a88b66b4abc475ea544554ff871e1b6c8ed6e1a5c1f68d61be413eb27a
font_01_sfnt_off0000f585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF585 11084 bytes
SHA-256: d5ff6a30b7022387fdae61254b0db9d5481bf2f5a57d01bf96ff7cc7a6794987