Malicious PDF — malware analysis report

Static analysis result for SHA-256 9337bb0f2473ee0c…

MALICIOUS

PDF

89.9 KB Created: 2021-04-14 07:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 45c16db9754ba1bebe8b0366882bb0a5 SHA-1: da5d40ef80400ed3196c3490e4c58bea84a6fa24 SHA-256: 9337bb0f2473ee0cb1cbe58d66e6f4b19438f2145cb4280e655bc56cf1848bf5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9967

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/strik?utm_term=vocabulary+and+spelling+practice+book+answers PDF link annotation
    • http://usesalle.xyz/wixebuzajitopisuzezaxudipq1t0y.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/hijd0jd/alone_nico_collins_lyrics_1_hour.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/hj5iagg/waxijiwekidikawozejufeb.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/jichjt6/the_walking_dead_season_10_episode_16_online.pdfIn PDF document text
    • http://newsportstechnology.ru/89390851710sxxob.pdfIn PDF document text
    • http://marketitaly.info/61361828903dn9sw.pdfIn PDF document text
    • http://fapseo.ru/476486814800owlx.pdfIn PDF document text
    • http://xxlmature.site/kodipedidosadewavuropexyrogn.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/NjcZBJi/infinite_loop_apple_campus.pdfIn PDF document text
    • http://fishland.store/customer_feedback_survey_template_wordt5v95.pdfIn PDF document text
    • http://haifaiv.ru/arris_sb6141_manual7n5tz.pdfIn PDF document text
    • http://artyom.guru/american_red_cross_cpr_renewal_near_me68pd9.pdfIn PDF document text
    • http://allerlo.xyz/very_hungry_caterpillar_sheet_cake3o273.pdfIn PDF document text
    • http://olivamebel.com/rollerball_2002_paul_heyman3hpuj.pdfIn PDF document text
    • https://cdn.sqhk.co/dojarodawiw/gjgjhgd/pawakaxoguxizitojogut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xemubekimivimed.epizy.com/pulujitapevigoluzaba.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/jowenimepurinosekoxebuxo.pdfIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_c52dde625ea34435b5f67ec88eba8a67.pdf?index=trueIn PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_e838227985f0449c84f35b8bc5d78c3c.pdf?index=trueIn PDF document text
    • http://musarozopod.rf.gd/witunaligita.pdfIn PDF document text
    • http://xuvatifovefad.epizy.com/48409439565.pdfIn PDF document text
    • http://sudipefenivu.rf.gd/cardiomegaly_causes.pdfIn PDF document text
    • https://dc5ca969-d333-4582-9879-b719aca70d73.filesusr.com/ugd/760c43_98de01bd29dd4a74823e5514a1829a70.pdf?index=trueIn PDF document text
    • http://minegavanifur.rf.gd/cheese_in_the_trap_ep_10.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/96159108046.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/math_workbook_grade_5.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_off0001205f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205F 5604 bytes
SHA-256: f7ad9745253fb02dcfc3ef5c39396f7c21b1c7c1e5024c4a41e4f95f14ba21ae
font_01_sfnt_off0001338e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1338E 11212 bytes
SHA-256: d6efd96b7a2c473957d64656f908d9ef4c3ad70a3164636aff893af0e00286b6

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