Malicious PDF — malware analysis report

Static analysis result for SHA-256 72886b3028ff8feb…

MALICIOUS

PDF

88.2 KB Created: 2021-03-14 12:55:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cddd81fdd6782493373b2c63eb8c003d SHA-1: d327774b736ea37607625681627219186737be58 SHA-256: 72886b3028ff8feb1d3e1aa2d5344a6aa9869495ff321ce7ffc4d98202a4e4f8
164 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to PDFs, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, potentially for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/123?utm_term=dynamic+slideshow+ae+template+free
    • http://veviwumifuvemuz.mypressonline.com/99797592924.pdf
    • http://tijukilebag.getenjoyment.net/a_series_of_unfortunate_events_the_reptile_room_book_review.pdf
    • http://kodavuviguwu.mypressonline.com/cds_exam_syllabus_2020.pdf
    • http://salestore.pro/fepegefoxeraversqzvh.pdf
    • http://raponikidosal.getenjoyment.net/safidajaze.pdf
    • http://gitikirazidapi.medianewsonline.com/how_to_write_a_movie_review_for_college_examples.pdf
    • http://boomua.site/47480665224f5urv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://90e68d66-75cd-4f9f-aa76-03b1e6b67b4d.filesusr.com/ugd/324cd8_ac27e64379c34560b049b78d8e9281eb.pdf?index=true
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_a5b7ac15bf2a46f4a0b6d20345add004.pdf?index=true
    • http://zonatitusajobo.onlinewebshop.net/88992716314.pdf
    • http://wegugoleta.onlinewebshop.net/stihl_ts_420.pdf
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_545d3b05f3d942bcb860d3bcd66e16c0.pdf?index=true
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_6fd1980a443a49379c200b573e96482a.pdf?index=true
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_997674e9b1284473bbaaecd36dedbf40.pdf?index=true
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_0334e847063e42908a32bf3d0a81e6fa.pdf?index=true
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_00a829e9cb1d49acad3bd553dee05d6f.pdf?index=true
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_b9fb76ff0c7e44b58a887fc96c33ff78.pdf?index=true
    • https://6448a590-b571-4b71-a9e4-820b8531b153.filesusr.com/ugd/782be2_aecab0621db94a0f863840fdd63f7ada.pdf?index=true
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_65dc466bca0e4ab7837bc0565d34651c.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001013b.bin
98611eb58c181b537da97e13d014572b147a2ae38461bcdd7c0908abd9261289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1013B 5376 bytes
font_01_sfnt_off0001135e.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1135E 1800 bytes
font_02_sfnt_off00011bec.bin
18b639d71b07399ab4e816814eac7ade0c5236166f1063e12b58a2a75f3dcdd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEC 11452 bytes
font_03_sfnt_off00014331.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14331 4324 bytes

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