Malicious PDF — malware analysis report

Static analysis result for SHA-256 47215001b1073d0b…

MALICIOUS

PDF

77.7 KB Created: 2021-05-06 02:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 87fa0ea4333423082882b949c0b6c332 SHA-1: 664e2b500c067509a97d6d27139eb54e6fec01b0 SHA-256: 47215001b1073d0bb64e12b02604dbe3107b42e21c1ce7cb5541cb03d4f1af22
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 0.9998

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 http://dezlice.ru/91842910583ytxv3.pdf In PDF document text
    • http://omerkatanalp.com/ipad_mini_5_used_price_in_saudi_arabia9bkop.pdfIn PDF document text
    • http://webmastervlad.ru/52757346142w2mit.pdfIn PDF document text
    • http://7lessons.fun/sryo_to_majiwaru_shikiyoku_no_yoru_ni90w7c.pdfIn PDF document text
    • http://bestunew.xyz/vocal_range_chart0n21z.pdfIn PDF document text
    • http://buloshnaya.site/swisher_60_mower_belt_diagramr0clf.pdfIn PDF document text
    • http://shtangye.xyz/koguxewipoviroyskzo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/n4t4wXRn-MA/wb?keyword=marvel%20comics%20graphic%20novels%20listPDF link annotation
    • https://uploads.strikinglycdn.com/files/b17ff149-13ba-4432-9eac-31c1feff6c66/5889642437.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_c0ea277af25d44abbbcd6e886494e555.pdf?index=trueIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_2aba3c82a04b4dcd895004f8708368b5.pdf?index=trueIn PDF document text
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_f2b7fc414b2d4ebbb6cfd110112791fd.pdf?index=trueIn PDF document text
    • https://9329dc78-1a6b-4cc7-98ac-1b36262b7dd5.filesusr.com/ugd/d2be55_1bc3d16df4394c84aedcbfc97fd2a71f.pdf?index=trueIn PDF document text
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_36aee4beb2d94a039f9a5bf952febaa1.pdf?index=trueIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_786e8b0bf6bb4c379a7350d4d7075060.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b131dd-124a-4638-87cd-ff1d7a03ff20/the_compound_effect_arabic.pdfIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_fccc0d1f795343fcb94035b897c8a2d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfcf2f50-a435-447d-890d-310b37783eac/lavuzosuzawuw.pdfIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_5841f738fb1e4613bdb8011d25da6d23.pdf?index=trueIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_ccfed291109c437e8c5eaf4875de4678.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab560f6c-7e32-406e-8e2d-28c35f2d2a8b/zezadaguwoj.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_off0000f0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 5412 bytes
SHA-256: 2bee3b7e3d0a46de216f8f34a7a36beb21b839817bef27835c7e1002aa73de0e
font_01_sfnt_off00010344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10344 11188 bytes
SHA-256: f5360fe25a0d6bc7811ac9bb5b3f286de208afd30e688e08bf548d3ad5b1a6c6