Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db848d670eda97b…

MALICIOUS

PDF

72.9 KB Created: 2021-03-23 07:43:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f6da224a7aa4305364f04e7838adc618 SHA-1: 9e1a6bae2eb16a0d507ff746df74271cfdc3c7ae SHA-256: 0db848d670eda97be5f960eec9e0cff14f6cbba89ecdcfff681d60d57da9382f
186 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 0.9997

Heuristics 6

  • 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 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.
  • 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://leonvi.ru/wix?keyword=the+field+guide+to+data+science PDF link annotation
    • https://ruzuwigowan.weebly.com/uploads/1/3/1/4/131453288/lidakobubirew.pdfIn PDF document text
    • https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/1528236.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/jpKp9gc/infinity_pool_design_plan.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/samsung_un65ju6500f_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/ergd9ij/lukasezojidu.pdfIn PDF document text
    • https://tilawifi.weebly.com/uploads/1/3/4/4/134480999/3859825.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/gefaxuv-pubabol-pofawen.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/best_mossberg_930_spx_upgrades.pdfIn PDF document text
    • https://wakevilapiz.weebly.com/uploads/1/3/4/9/134903367/4d615.pdfIn PDF document text
    • https://tukadivi.weebly.com/uploads/1/3/2/6/132695248/miwabusaso-kobonifazaxuxak-gugufol.pdfIn PDF document text
    • https://cdn.sqhk.co/jebuxanit/gcNjgVo/sefew.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/hb60sih/honda_gx160_motor_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/ragonujip/iageTjd/save_the_girl_game_download_for_windows_7.pdfIn PDF document text
    • https://jizotigop.weebly.com/uploads/1/3/0/8/130874082/xidutalubijod.pdfIn PDF document text
    • https://tuxewuwa.weebly.com/uploads/1/3/4/7/134776055/9927617.pdfIn PDF document text
    • https://buvekidi.weebly.com/uploads/1/3/0/7/130775196/didef-fotazekedifos.pdfIn PDF document text
    • http://nujagexurej.medianewsonline.com/tewufoju.pdfIn PDF document text
    • https://vezinamitin.weebly.com/uploads/1/3/5/9/135984824/zejemebaferufa.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/jagux/harbor_breeze_santa_ana_ceiling_fan_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/what_is_the_most_popular_color_for_a_mustang.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_off0000e0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D6 5136 bytes
SHA-256: d7cd4ae8aa1ca22d9c9cad0d24729f70e5ab07672d7072f7fc382d0d7dbbf2d1
font_01_sfnt_off0000f252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF252 10688 bytes
SHA-256: 9e9eeb35e35dafd35309f0a329fa23f35ac688679cdc4f656d38c31bf8c15085

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