Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60fd2bd1e5473d9…

MALICIOUS

PDF

146.8 KB Created: 2021-03-02 09:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f3738487cd1bf7f9b8914d9c88478531 SHA-1: 9fc06826d1cccf03f66d62ec0ebba998ab0e4e30 SHA-256: a60fd2bd1e5473d9e64af91988f2b66c0da8298b3815e5c3f150f65753becc07
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9994

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 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://nipisod.ru/wix?keyword=saunders+nclex+pn+7th+edition+pdf PDF link annotation
    • http://pagebake.com/15904692365hj5vf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366978/normal_5ffefdd4271f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476758/normal_6014650747098.pdfIn PDF document text
    • http://sosed.market/breakup_of_yugoslavia3hosa.pdfIn PDF document text
    • https://bovuxugiz.weebly.com/uploads/1/3/4/9/134901291/7927637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458122/normal_600bc8e5926ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470830/normal_602dd197cbada.pdfIn PDF document text
    • https://gagivoxiw.weebly.com/uploads/1/3/5/9/135991060/juwufu-dozewa-wanikij-rovari.pdfIn PDF document text
    • https://xonasuxodu.weebly.com/uploads/1/3/2/6/132681295/jodimibejozawomekex.pdfIn PDF document text
    • http://jewlgems.com/nanomaterials_lecture_noteshpa3t.pdfIn PDF document text
    • http://lnstagramaccounts.com/best_funny_videos_download_teluguo61q7.pdfIn PDF document text
    • https://rutosediwuxi.weebly.com/uploads/1/3/2/8/132814231/nawomakifivipe.pdfIn PDF document text
    • http://womenita.fun/gudupawusukfhjxp.pdfIn PDF document text
    • http://curvepreloved.com/fashion_vocabulary_advancedivslt.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/zemedorogukivunet1h0ai.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/koten-dimara-gixokudadiga.pdfIn PDF document text
    • http://gloslides.com/clasificacion_de_las_empresas_turisticas6ld1k.pdfIn PDF document text
    • https://kunatelifarak.weebly.com/uploads/1/3/2/7/132712072/6577981.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/pevarijidasalop/hau_bsc_agriculture_online_form_last_date.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/boxuregonijikizumineme.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/bemeto.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F3ED 5492 bytes
SHA-256: 46e1ae6793558c3cefd924381f223d427b1b54c9a7337e39c2cf979ce78315a9
font_01_sfnt_off0002069f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2069F 4312 bytes
SHA-256: 4bfc569e579df8d559c7a32cffd97b05027c7e2b8c7a5ed3e45c11ccd7f34778
font_02_sfnt_off000216bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x216BB 11456 bytes
SHA-256: d5dc901fad8fc9244ff2c560942bf80fc78f8195c79b83b15ed96010cbfcd3ec

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