Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c250ac22c3415c…

MALICIOUS

PDF

80.3 KB Created: 2021-03-24 23:57:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e76e6f9aaa6e7acaf8dd5cdda667f1fa SHA-1: 6a66846af72b2ec5ebab737ad21c861606ec3032 SHA-256: 61c250ac22c3415c6dc4d3ee78665c491a667aa5f3014b42f7bbcda4aa337ef1
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs point to various domains, likely serving as lures or redirects for malicious content. No scripts were extracted, but the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=peavey+tnt+115+manual+bass+amp
    • http://wotukujis.sportsontheweb.net/mbstu_admission_2020_20.pdf
    • https://kosemopadil.weebly.com/uploads/1/3/4/6/134669244/natox_vusudem.pdf
    • http://fonareru.22web.org/photo_slideshow_ae.pdf
    • http://kutejovanog.getenjoyment.net/mariwujimarelinotibax.pdf
    • https://fasexunatosupa.weebly.com/uploads/1/3/1/6/131606354/zakenezes-vuzesuvixuv-vipetenafikatos-fafetadamigut.pdf
    • https://xemubafuwifo.weebly.com/uploads/1/3/4/4/134475424/be4018bf7a4d1.pdf
    • http://lexibanoma.iblogger.org/sutebizevutuginurumapegiv.pdf
    • https://figusemaf.weebly.com/uploads/1/3/2/6/132682639/db8cca3a6529.pdf
    • https://pelepidavivi.weebly.com/uploads/1/3/1/4/131454492/b1a3d543ee2.pdf
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/lobowiroraduje.pdf
    • http://lebizifijafaxim.medianewsonline.com/cardiovascular_drugs.pdf
    • https://cdn-cms.f-static.net/uploads/4449392/normal_5fe7c56ec813b.pdf
    • http://zasaluto.iblogger.org/video_er_firefox_linux.pdf
    • https://xodisukuzoki.weebly.com/uploads/1/3/5/3/135390210/zepexawuxujimegugal.pdf
    • http://zamowafa.mywebcommunity.org/algebra_ebook_free_download.pdf
    • https://cdn-cms.f-static.net/uploads/4468286/normal_601f1175b968b.pdf
    • https://jepexilopenokaf.weebly.com/uploads/1/3/2/6/132680937/bigolamen.pdf
    • https://pagazamis.weebly.com/uploads/1/3/5/3/135310118/7884948.pdf
    • https://cdn-cms.f-static.net/uploads/4450145/normal_6032236ea2248.pdf
    • https://xexemisekugo.weebly.com/uploads/1/3/4/6/134679242/movetojomedunegawo.pdf
    • http://sefexetewizu.iblogger.org/crystal_reports_2008_trial_version_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vonikolodu.rf.gd/how_fast_can_i_pay_off_my_debt_calculator.pdf
    • http://jigiwema.epizy.com/fegilodoxaboxiguwubupaxan.pdf
    • http://tozemuj.rf.gd/68540661012.pdf
    • http://pokuwetov.rf.gd/kibawodofeworotezuxag.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee01.bin
b9ff7d84022e6f8b7ce9cb854ae98977ead60687f9feeaae8853723a103ffea3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE01 5072 bytes
font_01_sfnt_off0000ff3a.bin
47564b53697e8090b58901e1ee1fc07e0a3c39635a17f16b15949c5cfa9b6c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3A 10940 bytes
font_02_sfnt_off00012420.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12420 4324 bytes

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