Malicious PDF — malware analysis report

Static analysis result for SHA-256 d81373e2e77fb173…

MALICIOUS

PDF

71.8 KB Created: 2021-02-28 08:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d5f4e02dbc786f83bb5ee84791e8ab1e SHA-1: 8753c8b332e835f55ddac2510feb0e23b0d525b1 SHA-256: d81373e2e77fb173404a820fc158107b63cb844094159748b1b0aafe3196877c
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/award?keyword=the+secret+life+of+bees+book+chapter+2+summary PDF link annotation
    • https://perasukene.weebly.com/uploads/1/3/4/6/134644841/5ad129efd0c.pdfIn PDF document text
    • http://rikuximuvo.iblogger.org/bazigar_complete_novel.pdfIn PDF document text
    • https://simokodopegaliw.weebly.com/uploads/1/3/0/7/130776428/a8fef8b23bd3299.pdfIn PDF document text
    • https://duvefotod.weebly.com/uploads/1/3/1/3/131380754/4b8a450399c2.pdfIn PDF document text
    • http://bridgecommerce.com/basic_english_grammar_betty_azar_vkgqh3s.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/advance_auto_parts_near_meiw7fj.pdfIn PDF document text
    • http://itravelgr.com/sozinesunefitizafazefiwoc75e5.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/fGmjfhf/vice_news_hbo_reporters.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/bisafopulavazapovokpshk.pdfIn PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/parotowaduvit.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/nilititonawafim/rugugobipalikifozid.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/49556117594.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/36961463545.pdfIn PDF document text
    • http://fizuxobitunoge.epizy.com/2289180510.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/anbe_anbe_song_from_darling.pdfIn PDF document text
    • http://temomel.rf.gd/atomic_structure_worksheet_complete_the_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/programmi_per_scaricare_musica_gratis.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_off0000daeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEB 5640 bytes
SHA-256: db266bfeebd363445cf55bce8bb407ca15e2152cc9fd9fbadd88f2599a4a7800
font_01_sfnt_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 10504 bytes
SHA-256: 38487132f763630239c87b27525687643294b57c11c76dcf3a8706e110c9be13

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