Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a058c6a96342565…

MALICIOUS

PDF

65.6 KB Created: 2021-04-01 00:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d6ea58b93da2f3a31c8e9ab2eae4523a SHA-1: 587b3d8dc0877d9c55973a92badff5e5420f6ef4 SHA-256: 4a058c6a9634256520f32c81d288c3fb1dfca4b20aca42494b25bfac5710c0f7
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the overall structure point towards a malicious PDF designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=mount+olive+lacrosse+roster PDF link annotation
    • https://cdn.sqhk.co/zurajekiviw/bF7Xshb/buruwizimumukujemogivuno.pdfIn PDF document text
    • https://getivafet.weebly.com/uploads/1/3/5/9/135960962/8cb5e662a.pdfIn PDF document text
    • https://mutolumikiwow.weebly.com/uploads/1/3/1/8/131872082/7127464.pdfIn PDF document text
    • https://mogatuzutixu.weebly.com/uploads/1/3/4/6/134684840/8701070.pdfIn PDF document text
    • https://rinedasufuketon.weebly.com/uploads/1/3/4/3/134340565/gebibetet.pdfIn PDF document text
    • https://jeluxipofike.weebly.com/uploads/1/3/4/4/134490416/4180133.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/haBijpD/groupme_support_free_iphone_11_giveaway.pdfIn PDF document text
    • https://wisowoturap.weebly.com/uploads/1/3/1/4/131453432/6b34e.pdfIn PDF document text
    • https://jejepijukutu.weebly.com/uploads/1/3/4/1/134131362/a0cc8a75281.pdfIn PDF document text
    • https://pamesatigifimes.weebly.com/uploads/1/3/4/6/134639420/towagojusikot_rabiwekagasafek_regorum_movid.pdfIn PDF document text
    • https://timitadenemegi.weebly.com/uploads/1/3/4/7/134728598/vuluzukive_gefatut.pdfIn PDF document text
    • https://cdn.sqhk.co/xesenames/FxQyhbi/asme_pcc-_1-_2013_free.pdfIn PDF document text
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/25beb3d470.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/sizadagazagaj/lab_report_titration.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/que_sig_soar_con_que_se_te_caen_los_dientes.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/99775870307.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/axis_direct_demo.pdfIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_9e032a1f83f0497b8ffed5a7f5c9d3f8.pdf?index=trueIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_a2fe324c59ad40b2a9e3ee7555b52c58.pdf?index=trueIn PDF document text
    • https://6d1a2d78-ebd2-4140-94a0-411197be5b5f.filesusr.com/ugd/88ff89_1795319b2fef4ad6996ddee4220dfeba.pdf?index=trueIn PDF document text
    • https://12c9c681-cafc-4f88-93da-cb6f471fd49a.filesusr.com/ugd/f09a9d_e7cf17dfb61f4045be248579d23847dc.pdf?index=trueIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_d640f7d6602d4f78bb195a442fef3819.pdf?index=trueIn 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_off0000c843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC843 4860 bytes
SHA-256: a26ddf2f59351a4f986393c76df54f7d3d6c23b47ebde76bd7bda600186c1a81
font_01_sfnt_off0000d8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E8 9452 bytes
SHA-256: 28b499441c97aa8bbf86e446d21f59d042cfe40e20cca650471f8c3d68cfcbb5

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