Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a003685c8b4fa46…

MALICIOUS

PDF

78.3 KB Created: 2021-05-16 11:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 038145ea9306787b22009da08578f64b SHA-1: 546aa7e7a4cd58e27852433718046f781d947261 SHA-256: 7a003685c8b4fa46c8bb5b6bcce5c56272255d08d756f3d0fbef81768c808d56
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 0.9996

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://dugedepap.ru/strik?utm_term=ca+real+id+driver%2527s+license+fee PDF link annotation
    • https://pufoxufuzevelo.weebly.com/uploads/1/3/4/4/134486621/1e5665d.pdfIn PDF document text
    • http://realnoe-obshenie.online/cant_connect_to_internet_with_hotspotfb5vr.pdfIn PDF document text
    • https://tojemevu.weebly.com/uploads/1/3/1/3/131384016/tivubuvosofo.pdfIn PDF document text
    • http://detonic-deutschland.website/filofatusufitn91nu.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/6e1c60b574.pdfIn PDF document text
    • https://genebametujo.weebly.com/uploads/1/3/4/9/134904617/9203187.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_dc788aba33514c9aa0c3c549c67397ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/43516285527.pdfIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_aae3eba3ea774c55b1b2dfbc45feac23.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/72e9363e-bd56-446a-bcc5-1ec69db703a5/rexiwiwofozafusuladur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b58e5038-58f8-40a3-8f33-73b16e37fc9e/que_tienen_en_comun_todos_los_predicados.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/corpus_christi_high_school_preston_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/how_do_you_know_if_your_marriage_is_worth_saving.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_e31312cf44414c5b979d1fc665af03c4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bokofapig/88433999018.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/accounting_education_journal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8693da-e2ff-4c75-a38a-ac115cc65bca/tuwuzidiboxadalovexiguxez.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/is_my_samsung_tv_120hz.pdfIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_1cc84b4fc867468381c621cc751236af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jigezilor/561288004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3be7fc2a-503e-4abd-a024-dfe9e0154bca/lopoxafodokojepesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57afdeef-bf54-45ac-93f2-f7ba4c48379c/wederomowiwi.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_off0000f73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73C 5016 bytes
SHA-256: 62a46b088938fd0141854546706c11a810b835302ec5620694d45e103c43258e
font_01_sfnt_off00010864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10864 10308 bytes
SHA-256: c92a3be2dca5d66bd9480ff2ee4af775ecf10287052edd359fc6327a79b20568

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