Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bcc8a6e0ca6c18e…

MALICIOUS

PDF

71.5 KB Created: 2021-03-23 16:32:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e57ef06c37463ca5f0cd6f947f4bba71 SHA-1: 51664e24b17cb79f22aae89bb76a05c565c9279d SHA-256: 6bcc8a6e0ca6c18eb11c5f79070a6e101486c9c440486d2ca89f2eb7d2285e0a
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 0.9993

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://dugedepap.ru/award?keyword=present+simple+with+adverbs+of+frequency+worksheet+pdf PDF link annotation
    • http://maxapur.22web.org/duguxon.pdfIn PDF document text
    • http://relax35.ru/uniden_bearcat_bc125at_handheld_scanner._5003seqz.pdfIn PDF document text
    • http://kujazudoxiro.22web.org/vozeruwutugijadigituf.pdfIn PDF document text
    • http://bullbananavannaone.xyz/40850425578tsjyj.pdfIn PDF document text
    • http://nabizutun.iblogger.org/titubazabodirunewunupavad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_605186d44b523.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369514/normal_5ff7e36337a9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484814/normal_5fd1709f0ac62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_6051510fa60d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452862/normal_6046547c4189d.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/welanisowari/tibawuzopazolelijivokafi.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/38909352537.pdfIn PDF document text
    • https://e39bfc17-a898-4016-ac91-fc9303c112df.filesusr.com/ugd/b5068a_3d21064aafb14fdead3f0c2e24a2dc39.pdf?index=trueIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_3b3853187aa44b9a967b00acf6b11ac4.pdf?index=trueIn PDF document text
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_8c11be91dd5b4325857ca2817a0772f6.pdf?index=trueIn PDF document text
    • http://lodabaximuxulul.epizy.com/acrobat_reader_editor_online.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/the_stranger_albert_camus_chapter_1_analysis.pdfIn PDF document text
    • http://mudalulox.epizy.com/how_do_i_trade_bitcoin_on_luno.pdfIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_f05a4487296540fdb153735003292976.pdf?index=trueIn PDF document text
    • http://pefanusomi.epizy.com/xusejalovadokazulixukosu.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/industrial_engineering_project_reports.pdfIn PDF document text
    • http://tizovosavudufi.rf.gd/47264988561.pdfIn PDF document text
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_e2f3a10e65a04ab39c6b0cf6525c2ac8.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_off0000d958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD958 5980 bytes
SHA-256: 9c270f2523af07021563baa396ae0cb16ecb4344a72c1d8bf5711636e26dbff0
font_01_sfnt_off0000ed9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9E 10000 bytes
SHA-256: df891063a8f799010de0802a64089c113b3218342ba559b7200101b0a90de65b

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