Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97dd8b2023cea10…

MALICIOUS

PDF

75.5 KB Created: 2021-03-17 21:56:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f913d083466cceac83ba81489ef973b3 SHA-1: b1958a5943b883e41b89879152faf0ba24f929a7 SHA-256: f97dd8b2023cea106222b46d3cfc966f51d8c1f4e9f939916e97cb1949e21258
186 Risk Score

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 0.9997

Heuristics 6

  • 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.
  • 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/wix?keyword=periodic+table+of+elements+word+search+answers PDF link annotation
    • https://gazevasodixobex.weebly.com/uploads/1/3/4/4/134437076/jojes.pdfIn PDF document text
    • https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/40d9173.pdfIn PDF document text
    • https://degijidugaf.weebly.com/uploads/1/3/4/8/134886203/2216913.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/4d087489a4d764.pdfIn PDF document text
    • http://itverys.space/xorib828dt.pdfIn PDF document text
    • http://mkuu.club/photo_background_eraser_app_free_downloadown4q.pdfIn PDF document text
    • http://dayzcommunity.info/dametk7s6d.pdfIn PDF document text
    • http://thehensleys.org/ynetim_ve_organizasyon9oa5b.pdfIn PDF document text
    • https://sebinegovana.weebly.com/uploads/1/3/4/0/134095930/mawupunibumapal.pdfIn PDF document text
    • https://mebuduwo.weebly.com/uploads/1/3/1/4/131453299/4270108.pdfIn PDF document text
    • http://vovpomnim.ru/eagleton_why_marx_was_rightnznye.pdfIn PDF document text
    • https://lamamamim.weebly.com/uploads/1/3/1/6/131606140/468960.pdfIn PDF document text
    • https://vitudanowule.weebly.com/uploads/1/3/5/3/135341415/cc1dc8073c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_21ae871f23e14b17885c2cb2ff6ab246.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xefejevife/afterpay_touch_group_limited_annual_report_2018.pdfIn PDF document text
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_28eafedaa06c4220b76ffb81f4202bcc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/55842957905.pdfIn PDF document text
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_f48a2e6cffcd49178301142f5a9b57f9.pdf?index=trueIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_6dabfd9e9df248a6bffb5cc5a0bd11f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jezobasit/the_monkey_king_cast_2020.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE781 5492 bytes
SHA-256: 243413b62a8df89dc16abbc9a9b632d7bd41066374ede4224d54324092e5ec75
font_01_sfnt_off0000fa12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA12 10980 bytes
SHA-256: 004e6959158f69f7f7edc6136b6268cc68b04c8ac6c83f172ae53154ca680485

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