Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16d3284b9baddbf…

MALICIOUS

PDF

76.1 KB Created: 2021-02-23 22:20:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e279adb010c582fbb4a6620fa6621a00 SHA-1: 1210887960640bbbcbf36cc48daeb0ff7fd4a183 SHA-256: f16d3284b9baddbfca46ef4a9e242834bb7d0886d99cc9c0dbd5939709925662
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by 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 4

  • 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.
  • 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/strik?utm_term=air+force+ones+white+mens PDF link annotation
    • http://prostosite.site/pexerevurogefubovigli3cw.pdfIn PDF document text
    • http://secureappeal.com/rnek_teklif_formu_excel_indir3vn7b.pdfIn PDF document text
    • https://pemanawawe.weebly.com/uploads/1/3/5/3/135320082/813d62bce880d.pdfIn PDF document text
    • https://rozenawaxu.weebly.com/uploads/1/3/4/5/134517597/tarosened.pdfIn PDF document text
    • https://xezatitewifesel.weebly.com/uploads/1/3/4/3/134393938/7372432.pdfIn PDF document text
    • https://libigidibejaxa.weebly.com/uploads/1/3/3/9/133997225/2801162.pdfIn PDF document text
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/7765680.pdfIn PDF document text
    • http://ozalupa.space/sahih_bukhari_volume_2_hadith_1552lurss.pdfIn PDF document text
    • http://shoppingyxplus.xyz/how_to_renew_lapsed_cosmetology_license_in_georgia0ka0f.pdfIn PDF document text
    • http://temilops.xyz/scottish_highlander_crossword_answerpzrih.pdfIn PDF document text
    • https://kipopidetudi.weebly.com/uploads/1/3/1/4/131407440/bbd21ab9a5.pdfIn PDF document text
    • https://zademufexek.weebly.com/uploads/1/3/4/7/134765537/7d1bf.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/ropuba/cambridge_primary_english_stage_1.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/ks_academy_sap_may_2019_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/70485698930.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/cv_format_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/45614947630.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/naziwuganoxuvodokob.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/free_telugu_audio_songs_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/best_android_emulator_for_app_development.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_off0000ee79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 4960 bytes
SHA-256: 3dd0051bd08cca3c714e763be56c55a5c2beeb8ca7c198d019f9552a6028ce8f
font_01_sfnt_off0000ff48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF48 10700 bytes
SHA-256: c0afc0b6f0f942565b4e3b3cbd34a026fccacf38bcdf8063b40149aa44b922b3

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