Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb2ae4e65eee70a…

MALICIOUS

PDF

107.1 KB Created: 2021-04-08 10:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30e366009e5b7ba8a71d14ea9ae292e2 SHA-1: dec0fc27d8edf39b79bc45dd47e4a6733515e6b6 SHA-256: 0cb2ae4e65eee70a9c45ef1103c33eb3dc9edc9f63f65abbc6fc6a8094224819
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm designed to host malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of a download button lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/123?utm_term=tamil+dubbed+movies++in+tamilrockers+hd
    • https://titumakusijuvap.weebly.com/uploads/1/3/4/3/134353199/677740b1.pdf
    • http://new-leggins.site/capital_letters_handwriting_worksheetykjdb.pdf
    • http://titanovyi-filtr.ru/2020_nsw_school_calendar7a4j7.pdf
    • https://danifiwap.weebly.com/uploads/1/3/4/5/134585556/3343579.pdf
    • http://lessonsonline.site/metformina_glibenclamida_500_mg_5_mg_plmle14v.pdf
    • https://pabibajezejav.weebly.com/uploads/1/3/5/3/135323938/fb7313e2b2b5b6d.pdf
    • https://getazepamotiga.weebly.com/uploads/1/3/4/3/134352900/pewakabuzisox.pdf
    • https://napopetonepew.weebly.com/uploads/1/3/1/1/131164038/571919add83a2a.pdf
    • https://bolamowoxuwev.weebly.com/uploads/1/3/3/9/133997192/zukogexuwerupid-punujuxizebubin.pdf
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/fewegetanevekofedixo.pdf
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/bitofug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://s3.amazonaws.com/sizadagazagaj/pandora_plus_apk_free.pdf
    • https://s3.amazonaws.com/vavapekadoliti/monique_and_the_mango_rains_ebook.pdf
    • https://s3.amazonaws.com/xoguwavosuje/hyperbole_and_a_half_free.pdf
    • https://s3.amazonaws.com/bededuxotulapil/authentic_assessment_book.pdf
    • https://s3.amazonaws.com/vonutavekip/hypoglycemia_guidelines_nice.pdf
    • https://s3.amazonaws.com/zuguvoxoki/buying_decision_behavior.pdf
    • https://s3.amazonaws.com/vonusirukete/xuzitasenalewiriga.pdf
    • https://s3.amazonaws.com/falufusu/xegigitunuzusedutenobag.pdf
    • https://s3.amazonaws.com/zoluwivebiro/newspaper_article_template_word.pdf
    • https://s3.amazonaws.com/pevarijidasalop/dometic_8500_awning_for_sale.pdf
    • https://s3.amazonaws.com/kefiperizonofu/faded_piano_sheet_easy.pdf
    • https://s3.amazonaws.com/sitozi/menibumumuzawadanofazo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014332.bin
9a1e83cebcbd8d32ae7724666afbe50c34bc55582ca856119caa04d5de7d7030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14332 5392 bytes
font_01_sfnt_off0001555c.bin
5b1e59b7f493dead05534cacbcd25b1f7bce8514298c2bae48a0f579cd0dbb2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1555C 2528 bytes
font_02_sfnt_off00015ff8.bin
edbc9ec32d5d9cebae9b23245d246c48aa4954138c312e1ba1b03822e85f4f2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FF8 11888 bytes
font_03_sfnt_off000188b5.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x188B5 16164 bytes

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