Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f7324b48e87b4e2…

MALICIOUS

PDF

47.4 KB Created: 2020-11-05 00:26:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5e2b1099dcadcfab9270bf12ec1b49ca SHA-1: d85a2c236e3666e0e739ef6dfb0e9761ccf1a58c SHA-256: 6f7324b48e87b4e24131db26334e5cbe44df14f1c270d3c5eefc8e9d72893590
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://ggtraff.ru/strik?keyword=sun+joe+dethatcher+manual+instructions In PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/69891e21773f2.pdfIn PDF document text
    • https://kuliwulakut.weebly.com/uploads/1/3/4/5/134523122/pudolaxanukemese.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/1/0507/0084/5248/files/76357902555.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/aptitude_test_for_electrical_engineering_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c9cd92-90b0-4698-9d1e-a681199a5fa5/gomexuzagugokakiladusizas.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/fresno_fox_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/winotiralinawal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1ba6ea-c3b0-416f-8359-55b1f779b3aa/6165377423.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/a_wrinkle_in_time_chapter_11_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dcf6e1c-0730-4cf0-9403-64aff332ff24/instructions_for_dash_egg_cooker.pdfIn PDF document text
    • https://s3.amazonaws.com/tefelaj/cop_gymnastics_centre.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/bstc_result_2018_name_wise.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/sixth_sense_technology_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1d6040-e0f0-4e29-917f-d24cbd56d567/40048640068.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 5240 bytes
SHA-256: 02f05698cac33833d7601734c3720ef6f62cac38211562cf95e9296b3d220b81
font_01_sfnt_off0000735b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735B 2484 bytes
SHA-256: 3d63e427762aecea0b7e66bf9d2deb90c9e925b3232e6d6ed63d9b3c7e2f2f28
font_02_sfnt_off00007e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0A 10732 bytes
SHA-256: 567382fe34977cf177c15b93237fc360c10772055dcd475997094dac39685231
font_03_sfnt_off0000a25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA25B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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