Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1a0a0225bf86d7…

MALICIOUS

PDF

76.9 KB Created: 2021-02-24 18:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 14a18e2e5806f47256116b8c70d84057 SHA-1: d6dd58eb2d6b9c33b805f177cb187a332aa9bd29 SHA-256: 9f1a0a0225bf86d7728e49d53da8ea0c70be5a57d019872f0371539211c57357
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://jacksth.ru/123?utm_term=power+book+ii+ghost+cast+tommy PDF link annotation
    • https://cdn.sqhk.co/xawobovuji/ejeWbgd/xopibozojajimavivagarire.pdfIn PDF document text
    • http://bikuribowe.22web.org/mijotufilimamaten.pdfIn PDF document text
    • https://cdn.sqhk.co/xorilulog/iaEU5ii/history_channel_app_samsung_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/jjhcCie/57412247868.pdfIn PDF document text
    • http://dolinunuridaku.iblogger.org/mugovojugadun.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/6fb22313d107ca.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/jfjepgj/high_waisted_side_button_pants.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489722/normal_5fc739ca170b8.pdfIn PDF document text
    • https://cdn.sqhk.co/jemowevu/R40eYhj/adventure_capitalist_cheat_engine_table_2020.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/tigovatolis/dikiratiwugosaxuwinod.pdfIn PDF document text
    • http://zezajezo.epizy.com/echo_pb-250ln_carburetor_cleaning.pdfIn PDF document text
    • http://sawutekoxa.epizy.com/92992143858.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/echo_cs_590_muffler_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/windows_media_player_windows_7_professional.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/gasejozazilel.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/chsl_answer_key.pdfIn PDF document text
    • http://jifejibi.epizy.com/33615640974.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_off0000f04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 5580 bytes
SHA-256: a1b77247b674c5929d337f979551ea99e661325fd44d5afe2e7526ed21820fc9
font_01_sfnt_off00010340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10340 10328 bytes
SHA-256: eb4709a083344b854262766a8f7a31c8ed569ac4d6da8b5ef0d5105af5a0eb00

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