Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3f879cc0e05eb4…

MALICIOUS

PDF

69.3 KB Created: 2021-03-24 12:44:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6f00355d981069096590d54f0f819ab1 SHA-1: 3124097858365bdd9bceb60fae2de4400990b2a0 SHA-256: ac3f879cc0e05eb48d6ac31d938fd6c6be0ed76968f4e691225516d2355c89e7
184 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7831

Heuristics 5

  • 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
  • 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://xajibur.ru/award?keyword=nielsen+breakthrough+innovation+report+pdf PDF link annotation
    • https://cdn.sqhk.co/lewonuvaxu/ii9WSjh/coloring_book_art_gallery.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/l0lsgc7/xikotovevonovagu.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/JV2oiiy/bipujudop.pdfIn PDF document text
    • http://oneitshop.pro/dave_ramsey_financial_peace_university_courseqoyzh.pdfIn PDF document text
    • http://knitfqph.site/zemed2ihj1.pdfIn PDF document text
    • https://tebafazar.weebly.com/uploads/1/3/4/2/134265880/8684773.pdfIn PDF document text
    • http://classkaod.ru/taco_bell_power_bowl_no_rice_no_beans_nutritiontu0um.pdfIn PDF document text
    • http://devgm.design/mark_sheet_in_excel_school0d5v4.pdfIn PDF document text
    • http://montana-media.com/2389210571xq28b.pdfIn PDF document text
    • http://xiluzoxasefeb.iblogger.org/kidonozidebojib.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/jujowira.pdfIn PDF document text
    • https://bebiluredop.weebly.com/uploads/1/3/3/9/133987060/zizezubaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/cTjfjaU/sabumo.pdfIn PDF document text
    • https://cdn.sqhk.co/rupomotiz/fie2Sij/draw_something_classic_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d7179dab-c972-4501-9f4a-16044ca71e84.filesusr.com/ugd/434f74_b62bb093da4440579441be13f6d0fc95.pdf?index=trueIn PDF document text
    • https://1794ee33-230d-455b-98b1-84d48067edce.filesusr.com/ugd/551769_972ef1c4ef7f4133baa0cbe22808fb6c.pdf?index=trueIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_3ccf826ab1bb4384876019a32ccc7065.pdf?index=trueIn PDF document text
    • http://zosajirigo.rf.gd/44697936729.pdfIn PDF document text
    • https://d8ec88ce-93b1-4b83-b294-7016fd5b5063.filesusr.com/ugd/366252_6f4bbf55090741bbb201a7922a88d407.pdf?index=trueIn PDF document text
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_6897c1d980624f78a5708f2d3d8ff72b.pdf?index=trueIn PDF document text
    • https://a943cdc4-551e-4fd6-8842-bb1c82e441e2.filesusr.com/ugd/a0303e_8a033345f0774c6da45106cd7696ff4e.pdf?index=trueIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_0aadcfc5ea0f4b95af7c87bc6c225673.pdf?index=trueIn PDF document text
    • https://62619d47-812b-4c4f-a232-aa08d86264e8.filesusr.com/ugd/6d62c1_d362c66252974eb39610d9d1c1ff49f3.pdf?index=trueIn PDF document text
    • http://vedulojut.epizy.com/89658359766.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EC 5536 bytes
SHA-256: b91eae4125cf33f7c1ed2e20dabd554e6a55bf5aa96aa5c478234abde60b41a4

Open this report in the interactive analyzer, or submit your own file for analysis.