Malicious PDF — malware analysis report

Static analysis result for SHA-256 572bc15cdfbece32…

MALICIOUS

PDF

72.5 KB Created: 2021-05-04 01:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4dd2a244acc3ca7495b16b6e3cdb3b29 SHA-1: 10f5bd02fe1e434e7b7a15221b4acb6b5aae10ac SHA-256: 572bc15cdfbece3278feaedf2ea077fd0daea0355b92988ca00ca09586d09f24
156 Risk Score

Malware Insights

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

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-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://jacksth.ru/strik?utm_term=el+uno+es+como+un+palito+el+dos+es+un+patito PDF link annotation
    • http://wonder-ita.fun/440202492434vab1.pdfIn PDF document text
    • https://pobanebutu.weebly.com/uploads/1/3/4/5/134592169/df33a7.pdfIn PDF document text
    • http://ig-soft-team.com/29037458871vk3vb.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/9297694.pdfIn PDF document text
    • https://puramekekekiz.weebly.com/uploads/1/3/4/6/134648744/4211902.pdfIn PDF document text
    • https://pupaxutakigi.weebly.com/uploads/1/3/4/5/134579126/4633922.pdfIn PDF document text
    • http://indohealth365.online/tafufotufekivomumobovlkujn.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewakuw/igmlSBu/lovipavinezunabafafuzaxu.pdfIn PDF document text
    • http://grizhoff.ru/nikitapv2v8.pdfIn PDF document text
    • https://cdn.sqhk.co/xazururoxe/6hoPcLE/65059210127.pdfIn PDF document text
    • http://avbox.org/norse_gods_of_warmivsa.pdfIn PDF document text
    • https://kazedodaregiz.weebly.com/uploads/1/3/4/3/134368633/fab49772a0f6a.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/kewuxejikiwe/django_template_extends_base_html.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/93178460866.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/95190075930.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/punching_shear_formula_for_footing.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/grillsmith_turkey_fryer_assembly.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/43967375012.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/nadunijonuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/how_to_earn_money_through_android_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_off0000db72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB72 5080 bytes
SHA-256: a96bd592f87f18b1fd1fd9740e2b0350acddfa4c33af164b5772285ed4b3df3d
font_01_sfnt_off0000eca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA5 11708 bytes
SHA-256: b94b4c38f298cdbe5931dd0a909cd3d6ac317fd7f0da205e0e96109e9df22394

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