Malicious PDF — malware analysis report

Static analysis result for SHA-256 9864748da0c24626…

MALICIOUS

PDF

76.3 KB Created: 2021-05-02 23:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7d7a0c8adbc23e7283bfb2f9bf114c56 SHA-1: 296cbf4bbd7ab9f3e0d3351a42acc45b1a67f506 SHA-256: 9864748da0c246266c1252520bb90c65ef591e260174c3b23324f895a52323e2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are dynamically generated and point to other PDF files, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, appears to be a query related to unit conversion, likely a lure to disguise the malicious intent. The presence of ClamAV and ML heuristic firings strongly indicates malicious content, likely phishing or malware distribution.

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 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://zajinet.ru/strik?utm_term=cuanto+es+5%25273+en+metros+y+centimetros PDF link annotation
    • https://sukutunog.weebly.com/uploads/1/3/5/3/135304197/e84bb.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/nEichzb/us_stock_market_freeze_today.pdfIn PDF document text
    • http://naturalm.space/whirlpool_quiet_partner_ii_troubleshootingug1yi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468531/normal_6047828cdb3be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406809/normal_6033fb33c1265.pdfIn PDF document text
    • https://libesomed.weebly.com/uploads/1/3/4/9/134904451/kawatez-mawope-bakowubul.pdfIn PDF document text
    • http://idealica-italiaoficial.site/30251711598r768m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_60584ef98669a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418777/normal_60375a681b2b6.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodabatot/idjehhJ/kml_circle_generator.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/vx0hghg/transmission_fluid_color_brown.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafajem/fGFjiZk/vopigare.pdfIn PDF document text
    • https://fozabezadako.weebly.com/uploads/1/3/4/6/134639332/jidonuf.pdfIn PDF document text
    • https://lutigasudubuwa.weebly.com/uploads/1/3/2/6/132695203/8214648.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379982/normal_5fde33578f343.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/robumuduluwise/assessment_vs_evaluation.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/sheetz_food_menu_calories.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/what_is_the_chemical_formula_for_triglyceride.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/bassinet_sheets_adairs.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/kuxagurinosanigexub.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/heidi_klum_intimates_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/appleseed_alpha_parents_guide.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_off0000e993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE993 5244 bytes
SHA-256: 029f8c82ebf9221dbf53dae6a6bac7315dffa1b83adb2fbe43a25fe3e4909b0b
font_01_sfnt_off0000fb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB61 12460 bytes
SHA-256: 0f85582b8398e8b605df78c49736d1b31b43b0151fc154faeb84aa25e0697114

Open this report in the interactive analyzer, or submit your own file for analysis.