Malicious PDF — malware analysis report

Static analysis result for SHA-256 03298d8881bc6daf…

MALICIOUS

PDF

74.8 KB Created: 2021-01-21 03:30:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 37853a38764070111fa219a0ee113ebc SHA-1: 9c3c4b0c6a0dfa2c7dace87da4cf6236aed36e7b SHA-256: 03298d8881bc6daf3925aa188ef2aad5c15daef8100e3610f2c039c0b93fdb47
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a phishing or SEO spam campaign. The embedded URL 'https://maypoin.ru/wb?keyword=18th%20birthday%20cake%20designs%20for%20girl' is likely part of this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/wb?keyword=18th%20birthday%20cake%20designs%20for%20girl PDF link annotation
    • https://cdn.sqhk.co/ginijetemepa/iijbtha/facebook_portal_tv_review_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/higuhiE/best_free_call_blocker_app_for_android_2020.pdfIn PDF document text
    • https://joxobupapi.weebly.com/uploads/1/3/1/4/131454586/2448ad767ffa89.pdfIn PDF document text
    • https://cdn.sqhk.co/sukurorezib/dIhcicj/54276119414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f9f5b1883b71.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/bjcfhh3/75945746200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393626/normal_5fc029968a397.pdfIn PDF document text
    • https://tavutapakewig.weebly.com/uploads/1/3/5/3/135399939/lubowababiduxa-xanetefel.pdfIn PDF document text
    • https://cdn.sqhk.co/jibetovo/TOuhibi/brain_crack_level_87_answer.pdfIn PDF document text
    • https://cdn.sqhk.co/fabavukunatu/ishhV4X/hawthorn_bank_jefferson_city_mo_careers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455901/normal_5fbc9ebedd114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386621/normal_5fbd209c06975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407788/normal_5fbed760a8bd4.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/ghMgjaO/xidukizufoxufujatufan.pdfIn PDF document text
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/5859266.pdfIn PDF document text
    • https://viluxesoxumubi.weebly.com/uploads/1/3/1/4/131406714/5198507.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/tulosa/waves_maxxaudio_pro_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/accumulated_depreciation_balance_sheet_or_p_l.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/795614092.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/piridobelivako.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/fofulilivenazetuma.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/java_7_update_51_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/kirofalezozexiwi.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_off0000e578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE578 5740 bytes
SHA-256: 2c05ad40b714cc43d40170e0e65e324c5cb5416a7e18fe7af707a01dd0120019
font_01_sfnt_off0000f90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90D 10712 bytes
SHA-256: 0c8c4baf625145a4e701bedea037ee957237b8f7ae3fff5ba4c744f6aa84db05

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