Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3e0d394e83e1b3…

MALICIOUS

PDF

73.3 KB Created: 2021-04-02 06:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8b5cdc169cdc1223fd2be7f35dba8ea1 SHA-1: 9316e54a4e42b28152ff1f65ac7d514300217e36 SHA-256: fe3e0d394e83e1b33a07789b9d72ba6926e5bcb69d24e039b9bde5be98063369
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 0.9996

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 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://baarspo.ru/123?utm_term=redbone+childish+gambino+piano+sheet+music PDF link annotation
    • https://vomizovuzib.weebly.com/uploads/1/3/1/6/131637161/gojakurewaru.pdfIn PDF document text
    • http://wordsidepost.top/the_boy_in_the_striped_pajamas_summary_chapter_2ko4zl.pdfIn PDF document text
    • https://kadutazufe.weebly.com/uploads/1/3/4/6/134639852/49274.pdfIn PDF document text
    • http://rilotelexewobos.iblogger.org/she_bad_cameron_dallas_music.pdfIn PDF document text
    • https://murasujudadalox.weebly.com/uploads/1/3/5/3/135338307/kaxikim.pdfIn PDF document text
    • http://logusiba.22web.org/99519196689.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490273/normal_602aa65d9652b.pdfIn PDF document text
    • http://libesikume.22web.org/23326662842.pdfIn PDF document text
    • http://gopudumimipabol.mypressonline.com/aptitude_questions_for_wipro.pdfIn PDF document text
    • http://terugate.mypressonline.com/ponuwalubugojojatadi.pdfIn PDF document text
    • http://wulurag.mygamesonline.org/puxasam.pdfIn PDF document text
    • http://daimontimur.org/nikafinexivgszwx.pdfIn PDF document text
    • http://mpvideo.org/black_and_decker_firestorm_jigsaw_partsg7x2y.pdfIn PDF document text
    • http://xiziwepotifeb.22web.org/madesin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_602707f62981c.pdfIn PDF document text
    • https://xonutadeb.weebly.com/uploads/1/3/0/7/130775355/8847302.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/55690771503.pdfIn PDF document text
    • http://sunepoxuvigos.66ghz.com/feveriwixawedojibike.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pasazaxara.rf.gd/15816377011.pdfIn PDF document text
    • http://zebezepewit.epizy.com/75938094048.pdfIn PDF document text
    • http://runoxujozu.rf.gd/ca_foundation_subjects_books.pdfIn PDF document text
    • http://zadotelap.epizy.com/eyelash_extensions_certification_classes_ri.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_off0000dd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD32 5540 bytes
SHA-256: e2fad53c02726ef365f5b0db8cf90add5aa8385a6ac9fd1263c54ed2a5a4f68d
font_01_sfnt_off0000efe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE4 11852 bytes
SHA-256: 138c542e730ec36bd0087e8f15ddd83da10209cb6d2fd71cb4dc1d2320d6b7ff

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