Malicious PDF — malware analysis report

Static analysis result for SHA-256 603c869336e94f97…

MALICIOUS

PDF

71.0 KB Created: 2021-03-01 19:16:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0e08d636925881424fa90b1fd2b5074b SHA-1: d2a62cd1db20ad8d78ff8cfc1fad0d6765a680e6 SHA-256: 603c869336e94f971712879e60ecb6d83d9eb632f27351a33f680e90ca3e596c
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://yafferge.ru/123?utm_term=apc+back-ups+500va+battery In PDF document text
    • https://nimifitirujaga.weebly.com/uploads/1/3/4/6/134693460/5030391.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/super_mario_sunshine_walkthrough_part_2.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/faa-h-8083-30_en_espaol.pdfIn PDF document text
    • https://xegezegev.weebly.com/uploads/1/3/2/6/132683484/81b7571a98.pdfIn PDF document text
    • http://jabewes.medianewsonline.com/how_do_you_write_measurable_goals_and_objectives.pdfIn PDF document text
    • https://cdn.sqhk.co/tonufipu/jcP6Jhj/occupation_2._5_v2._2._1_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/hge2Qig/zinuxanupinaxuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/detatakev/1ge21hg/kerejaf.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/gcgfUij/rabbit_public_domain.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/56374886148.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/coleman_roadtrip_grill_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/45296474135.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/notify_all_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/welixonegujipu.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/answer_key_mpsc_2018.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_off0000d5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F9 5548 bytes
SHA-256: 83af71a2cece6d88b1597e0d60c61e3166d32655ebecedf26d767e76c15174c6
font_01_sfnt_off0000e8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FC 11384 bytes
SHA-256: 97f7d71a8c2939557f85ed6a021e4b884a51935086ef8d1b09b0de794f0bfd25

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