Malicious PDF — malware analysis report

Static analysis result for SHA-256 448b97f6c1fce8c6…

MALICIOUS

PDF

73.0 KB Created: 2021-03-18 01:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 30a4a58693700f49c905773d2d5a48fd SHA-1: 5aa50702eeaefd0839038e82c880ac2035e75ade SHA-256: 448b97f6c1fce8c606186a60605edfbdd1be6f3f69746cdaed3a4a32123441f6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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/strik?utm_term=liftmaster+professional+formula+1+garage+door+opener+manual PDF link annotation
    • https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/vikanobunekofudepimu.pdfIn PDF document text
    • http://larekew.mywebcommunity.org/9185166373.pdfIn PDF document text
    • https://mubujibazakob.weebly.com/uploads/1/3/3/9/133986275/69ebe.pdfIn PDF document text
    • http://fuzepeter.22web.org/37374685118.pdfIn PDF document text
    • http://rigares.iblogger.org/how_to_clean_bissell_proheat_2x_revolution.pdfIn PDF document text
    • https://jijalasigode.weebly.com/uploads/1/3/4/3/134344414/jabuvizemebisaruw.pdfIn PDF document text
    • https://zikazofikadit.weebly.com/uploads/1/3/0/7/130739129/ginimilobutadekilite.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/36840163846.pdfIn PDF document text
    • https://fixupusojorulu.weebly.com/uploads/1/3/4/4/134438709/jetati.pdfIn PDF document text
    • https://vusuvokitajize.weebly.com/uploads/1/3/0/8/130874031/jizejev-finisew-noxidewiwulu-mipivapoja.pdfIn PDF document text
    • https://pasironukid.weebly.com/uploads/1/3/0/8/130814081/topitagidanaj_berugitulixuf.pdfIn PDF document text
    • http://pomulagija.iblogger.org/18409954089.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jodonurinifos.epizy.com/introduction_to_business_management_erasmus_free_download.pdfIn PDF document text
    • http://zanebinelit.rf.gd/krakow_visit_guide.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/kukexuzajovibumaka.pdfIn PDF document text
    • http://judixipe.epizy.com/donna_piano_sheet_music_lumineers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25ef193a-a66e-4bb4-bfe8-b0bd81bee726/good_group_topics_for_recovery.pdfIn PDF document text
    • http://kavolimuteso.epizy.com/58556986317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3313af6-50ca-487b-8cb7-d5c16619150d/vepuwogofujuja.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1D 5356 bytes
SHA-256: 651757a8c216e13f989d8a966f41e6f72dac53a2531f6587948067b7207cfd77
font_01_sfnt_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 10928 bytes
SHA-256: 90b0c4bf72b5676a2bc3ef9fe812f5e6321ae9e97ae96122bdb6cc11e004400d

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