Malicious PDF — malware analysis report

Static analysis result for SHA-256 211697d74e531de0…

MALICIOUS

PDF

74.0 KB Created: 2021-02-21 10:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4e44c0afa3152c1e0bba6174551b674e SHA-1: b84b30678194f0715a2ff4b05710746bf84afeee SHA-256: 211697d74e531de05f4d8314c692dac8ab78dfac5be630acb2e946c4bc8a9ac9
202 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
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/wix?keyword=catholic+funeral+planning+guide+worksheet In PDF document text
    • http://xiwotafajiloluf.22web.org/wixorekojojig.pdfIn PDF document text
    • http://scm03.ru/zombie_road_trip_trialsso3vd.pdfIn PDF document text
    • https://cdn.sqhk.co/sepolulegaba/ei1fq1a/civil_war_generals_game_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477863/normal_5febac3772c13.pdfIn PDF document text
    • http://genonaxeti.22web.org/employment_provident_fund_act_1952.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/Shchjjc/director_de_noticias_univision_miami.pdfIn PDF document text
    • https://cdn.sqhk.co/jivomawufem/JGUhcYC/7396209059.pdfIn PDF document text
    • https://cdn.sqhk.co/kesusevuzep/ha0Mjc4/vazurudizusek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fisumude.rf.gd/5367842183.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/standard_calibration_curve.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/ctenophora_caracteristicas.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/44415546700.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/nisogefififapameneludano.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/assamese_status_whatsapp_video.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/bokeh_full_jpg_offline_video.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/69345704240.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/altered_carbon_book_parents_guide.pdfIn PDF document text
    • http://benatababede.rf.gd/vejumexinogas.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_off0000e3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AB 5476 bytes
SHA-256: b7a036bdecc947ce0f9ee7da0a57db4f48d40575223fa8de9fb73d78a5a480f5
font_01_sfnt_off0000f658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF658 10856 bytes
SHA-256: cbab3d3e05a449ad4553b4ac1a63765508b1b209f567226b41952de0c02ffc63

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