Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a022535e598e3f…

MALICIOUS

PDF

95.4 KB Created: 2021-03-20 14:27:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70941f92d27d7a9daab7549662bacd1d SHA-1: b533156ed51f5d332ca65463ee92cb14feb57bf0 SHA-256: 50a022535e598e3fb00e62d6fd817803b082759b30eea4969d54572a82567427
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/wix?keyword=economics+final+exam+study+guide+answer+key
    • http://lulopoboxefon.scienceontheweb.net/somefuzumabalewafu.pdf
    • http://tufuwavaziga.mygamesonline.org/tin_tin_dog_breed_name.pdf
    • https://soguleta.weebly.com/uploads/1/3/4/3/134305846/gazakaxa-zaxitatafabuxa.pdf
    • https://cdn.sqhk.co/komagiju/jaicgfx/stick_warriors_shadow_of_legends_mod_unlimited_money.pdf
    • https://gewolokumopez.weebly.com/uploads/1/3/0/8/130814623/f3594ac.pdf
    • http://bulubuzigajuzar.getenjoyment.net/10772065797.pdf
    • https://cdn.sqhk.co/dasadogiso/UjdYIGr/super_coloring_ben_ten.pdf
    • http://liwexun.mywebcommunity.org/sixikolepufutoso.pdf
    • https://modisogisutoval.weebly.com/uploads/1/3/5/3/135390942/kiriradox.pdf
    • http://joxezorov.mywebcommunity.org/nodidomozovodiboxeja.pdf
    • https://fejegexe.weebly.com/uploads/1/3/4/6/134617501/5026550.pdf
    • http://metoxegid.mygamesonline.org/printable_ukulele_chord_chart.pdf
    • http://junumidutuzakox.getenjoyment.net/2005_honda_odyssey_misfire_problems.pdf
    • https://cdn.sqhk.co/mapetidul/izLjfic/pupixawevunigoregugo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_5d3b118cc0c445c1b86689fb4d3c44da.pdf?index=true
    • http://muliwavanebebo.onlinewebshop.net/wupozabasisorufutusup.pdf
    • http://jabodegodonirad.atwebpages.com/94370728829.pdf
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_612faf3a44ac4a36b79e03d2381aeed6.pdf?index=true
    • http://zagupijalixi.myartsonline.com/84252953638.pdf
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_9708264f315d43ca975e1355100e7972.pdf?index=true
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_26bb4853ab334f7ab6332cc0cc8c0d99.pdf?index=true
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_1e4d6addbfb74f2b8da52e17ee5928ed.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000133ef.bin
91bea624009224809be52bf574003998cbca5d071a76bd9327e19674ae6b8f78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133EF 5624 bytes
font_01_sfnt_off0001471c.bin
ccea16af1eb4ceeb1f57ce34ce4a743438fed5114091438ca78b672e41ed3f64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1471C 12352 bytes

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