Malicious PDF — malware analysis report

Static analysis result for SHA-256 514deaa5ff583423…

MALICIOUS

PDF

72.0 KB Created: 2021-02-03 20:06:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 78a0c9864a4f1304d993d14b10ac7295 SHA-1: f7269028e008578c45926deecf91bd8989020b37 SHA-256: 514deaa5ff5834235faa9fc91d83971445d7f582aaab4bbb3a88be233ca4f439
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://maypoin.ru/wb?keyword=responsive%20html%20templates%20bootstrap PDF link annotation
    • http://seomagnat1.online/10959102677rhq6v.pdfIn PDF document text
    • http://xitigedomure.66ghz.com/june_2017_sat_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/qjcgdig/56818282165.pdfIn PDF document text
    • https://cdn.sqhk.co/pomoliwekag/Khcjicx/83365479868.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/geidMjg/97052604396.pdfIn PDF document text
    • http://pek-24.cc/bugsy_below_deck_med_boyfriendvkycb.pdfIn PDF document text
    • http://national-verifyteam.com/96031256442nyczb.pdfIn PDF document text
    • https://bawokuxuduxiv.weebly.com/uploads/1/3/1/8/131856062/rososapotineka_fisopolonud_zatitegupewe.pdfIn PDF document text
    • https://cdn.sqhk.co/pozedezupase/sNIijhE/tapafanuwofekidejufom.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/sepawi/fluid_mechanics_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/the_sound_of_silence_sheet_music_violin.pdfIn PDF document text
    • http://vutagefen.epizy.com/8003066628.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/44820361878.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/14904578619.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/elementary_statistics_answers.pdfIn PDF document text
    • http://xenuduximowub.epizy.com/dowaxoj.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/scary_pumpkin_carving_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/lion_air_flight_610_preliminary_report_released.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_off0000de0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0F 5264 bytes
SHA-256: c6ac5d67fd43532b9cb58428e726c4222474baba7ab750f2b62e33b208a17561
font_01_sfnt_off0000efcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCC 10644 bytes
SHA-256: 5fd105a7bcbb4478ccf49714a298402516296059ed3ed4def51dba7d1eaeceb8

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