Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f7ee2199fc6156…

MALICIOUS

PDF

83.6 KB Created: 2021-03-16 01:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e42cf3532ea8ba152d5481a35049bf2a SHA-1: 51b1d6d7a9523cbd9e3cd029c1ed17d93e16f02c SHA-256: d4f7ee2199fc6156645c5191c6b67bc3e0a1e7f6f53e6e2e436c6eb536cc5b7e
164 Risk Score

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • 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
  • 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://seumenha.ru/wix?keyword=super+resume+builder+pro+apk PDF link annotation
    • https://zenisitidijo.weebly.com/uploads/1/3/4/3/134309999/puvovukufi.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/the_daily_trading_coach_review.pdfIn PDF document text
    • https://cdn.sqhk.co/wimebizag/hjiNwWx/6739001023.pdfIn PDF document text
    • http://moxilekulina.getenjoyment.net/convert_kindle_for_pc_to_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/jajh5HO/call_of_magic_morrowind.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/barriers_of_communication_in_an_organization.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/hheY8JA/forogurumutiratoxof.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/Iigibqm/surprise_eggs_fun_games.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/Tie9vld/banner_template_minecraft_photoshop.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzufoxo/gigghhF/sonic_the_hedgehog_classic_heroes_play_online.pdfIn PDF document text
    • https://cdn.sqhk.co/ledazukogim/Thgid67/personal_panic_alarm_watch.pdfIn PDF document text
    • https://zosojelukik.weebly.com/uploads/1/3/1/8/131871698/54458.pdfIn PDF document text
    • https://simiwulizolur.weebly.com/uploads/1/3/1/4/131455232/65ed1782fde1fb.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/a1d0Xfo/robert_harris_jr_facebook.pdfIn PDF document text
    • https://jiliwadikejupa.weebly.com/uploads/1/3/1/3/131379685/1798445.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/97776492911.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/osrs_blackjacking_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/46154526529.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/sasukuvinalevokigowifarov.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/vakofisej.pdfIn PDF document text
    • http://wudazebej.atwebpages.com/40704488841.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/76365853865.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/swtor_juggernaut_guide_6._0.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/auld_lang_syne_sheet_music_with_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/caterpillar_generator_sets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF892 5108 bytes
SHA-256: 12db50c3d41cdc3add2c4f6bcf04dfbe17870590de7d6fc0d20a34d6e2479912
font_01_sfnt_off000109da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DA 12568 bytes
SHA-256: 46eb227baed060f60db7481b844ba958194a94698e8f371090cd923af0ebfdb5
font_02_sfnt_off00013278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13278 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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