Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebc7da86fa4dfef…

MALICIOUS

PDF

86.1 KB Created: 2021-04-02 06:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fb87a2ea7d499c5f9e427a37c836eb41 SHA-1: e449e0930e99836b3ab513aba126689c786608d4 SHA-256: 8ebc7da86fa4dfefd2f10376882bf812a37a8e4de8df7952628c47c2f4431079
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 0.9998

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://gimoguvi.ru/123?utm_term=template+html5+css3+responsive+gratuit PDF link annotation
    • http://gopudumimipabol.mypressonline.com/96178575424.pdfIn PDF document text
    • http://vugaganopofom.mypressonline.com/logotitifegefawapiv.pdfIn PDF document text
    • http://vukuradi.mygamesonline.org/ps4_gta_5_code.pdfIn PDF document text
    • https://cdn.sqhk.co/tonuviwa/jhnjijh/34974802214.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/tidasuriwileworim.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/921139510834glt4.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/50905794083.pdfIn PDF document text
    • http://sfhgfje5df.xyz/giancoli_physics_for_scientists_and_engineers_4th_edition_ebookbqadp.pdfIn PDF document text
    • http://free-at.pro/bible_for_dummiesm6nkp.pdfIn PDF document text
    • https://cdn.sqhk.co/videmixolute/2qihjez/60407335358.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/de0ca1a7-6b42-4219-8ec1-b958d9b5b9e8/51524680864.pdfIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_801eec2a270a47f3a833e971ec215326.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/97762804980.pdfIn PDF document text
    • https://5a98ae10-8c7e-48da-b83f-9bcbc644cfa3.filesusr.com/ugd/9a8764_3ac4989eebe140e08a6aed049771d1e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/punctuation_worksheet_grade_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/585a3f71-b30d-484b-b48a-7efb0309b655/best_free_source_to_learn_python.pdfIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_37f2b069bbd4418a9cc7beab67e2caf7.pdf?index=trueIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_10848831c14142bbb0cbd1d693e1a736.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/myanmar_visa_on_arrival_form.pdfIn PDF document text
    • https://3ced707c-20bd-49bb-93f1-edb15be4e391.filesusr.com/ugd/e90305_b365543d05524d4c93124a18a3ed8c6e.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_off000112a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A3 5644 bytes
SHA-256: b480d0a9025f01e87f5b9a578209bc163b9aa1783c2f5243c8ea7607c42e1cbd
font_01_sfnt_off000125b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B6 11124 bytes
SHA-256: ddaec629e1be6ce17f9822348f7fb4ab1ed77ccfe83e4870f0efab6ae1c2f5cf

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