Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e12e1f6137e3206…

MALICIOUS

PDF

63.7 KB Created: 2020-10-30 08:28:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 386c43894d628768d5bcfdd55d279cf0 SHA-1: d885541345b4802b97ef8bb29d0ca01278f67da6 SHA-256: 9e12e1f6137e3206707e58069c333560cbb866e8e98f98438aca61188651a7b5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=todd+rundgren+songs+written In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5f8e1bb52e47a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_5f958e91911b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4295/3626/files/siemens_s7_400_plc_basics_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/bacterial_growth_phases.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1387/1018/files/american_racer_2_hacked.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/88420341758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3005/2005/files/mijobib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3128/8734/files/four_square_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/kizosexov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6112/4008/files/keylogger_for_android_cell_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/quranic_encyclopedia_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b6c91f-a320-40b8-8451-75307728fa58/biblia_de_estudio_reina_valera_1960.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/organisational_behaviour_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3658/5379/files/northwood_high_school_lena_la.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99CC 4676 bytes
SHA-256: 02184620ee4420c66228898a884fc0572e524f362db2e659dff12001b189622b
font_01_sfnt_off0000a9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9CD 11068 bytes
SHA-256: f45a9730a53fa33efbf23f89a3bcc398cbec4ab370bb7d9148f8d9c6c901cde0
font_02_sfnt_off0000cf37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF37 16028 bytes
SHA-256: 0bae8649ba252bcfab81cb8324cfe1737d73e47191b507e117e6d0858e0066a8
font_03_sfnt_off0000e382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE382 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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