Malicious PDF — malware analysis report

Static analysis result for SHA-256 015cc1434d2f1ef5…

MALICIOUS

PDF

88.9 KB Created: 2021-05-06 21:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fca0a88bcd76406e371a4009c08de20c SHA-1: f4fa5d47ad6f94bd6cdade8da3ba9e9ec247a523 SHA-256: 015cc1434d2f1ef590d84870641ac0e8a7fb7b8aef48445c15d04e0a43457b14
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://botokaw.ru/strik?utm_term=aircare+mini-console+2.5-gallon+console+evaporative+humidifier+filter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489983/normal_603e5b5a0127c.pdfIn PDF document text
    • https://cdn.sqhk.co/wetilusogaki/dgj8uhe/sigulawuvizepugagopesulu.pdfIn PDF document text
    • http://dilijox.22web.org/kukit.pdfIn PDF document text
    • http://speak4pro.com/adverb_examples_sentences1uj1b.pdfIn PDF document text
    • http://mazafaka69pussy.online/10_point_likert_scale_labelshvptx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458428/normal_600d98cfe273e.pdfIn PDF document text
    • https://cdn.sqhk.co/tifesijoja/gigW1G9/27477398995.pdfIn PDF document text
    • https://cdn.sqhk.co/wowobavukelo/rFNhfjh/39451857759.pdfIn PDF document text
    • https://cdn.sqhk.co/lunosupi/dhcUzjB/glowing_live_wallpaper_best_hd_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474723/normal_603d51fce998e.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/Hjhjgjd/battleship_north_carolina_wilmington.pdfIn PDF document text
    • https://cdn.sqhk.co/xumirikebixo/uhbsqeD/choorian_full_movie_hd.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/3jcFhg9/amnesia_memories_toma_good_ending_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/MjdhcaS/european_rowing_championships_poznan.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://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_361a88f4672342c4ad99df547ff5b16e.pdf?index=trueIn PDF document text
    • http://pizubape.rf.gd/historia_de_la_apicultura_en_mexico.pdfIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_5e9df059442f45d0a8ee7d4adcd4ae9e.pdf?index=trueIn PDF document text
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_47c0ff18f6c24910a8167d0a8d1a504b.pdf?index=trueIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_6fca4d28b0e243a1a5edbcdbd66cb0ad.pdf?index=trueIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_1a86e2f143a34739b9b1b81f9521a29f.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3D 5820 bytes
SHA-256: 58a64b18c3a58be796b4717584f06857ba01caf766c28dbb7cf704f36cb720b4
font_01_sfnt_off00011de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE6 12548 bytes
SHA-256: 6662a9776000287b230b54bb916462d27c49339460a206810f842d510f91604b
font_02_sfnt_off00014713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14713 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34