Malicious PDF — malware analysis report

Static analysis result for SHA-256 477e5806ef7e5a8f…

MALICIOUS

PDF

78.4 KB Created: 2021-03-21 20:54:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 02416b03a8cde74cf08048f5e07e1cdc SHA-1: 98c76bf9c6ee0298403ac0ee1d085ddb17cfab4c SHA-256: 477e5806ef7e5a8f369f65f9f4605bd7a86af51a01ace74cb52a4695fa5c21ba
186 Risk Score

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-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://resalured.ru/strik?utm_term=persepolis+pelicula+online+sub+espa%25C3%25B1ol PDF link annotation
    • http://kofupum.mygamesonline.org/hotpoint_gas_oven_broiler_not_working.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/5925583.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/jfT6oja/strategic_plan_app.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/fupirugo.pdfIn PDF document text
    • https://xaburopufazig.weebly.com/uploads/1/3/6/0/136051881/milipepalugela_setofubatamonem_keriludaruke_worakosowaw.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/gdjdhbk/33842431643.pdfIn PDF document text
    • https://suwisabinupa.weebly.com/uploads/1/3/5/3/135351097/c9722f8fb.pdfIn PDF document text
    • https://bumozirejukije.weebly.com/uploads/1/3/5/3/135340746/povixezusipur_vabijefovepi_mamusekefoxur_powatewozubis.pdfIn PDF document text
    • https://gimipozadifan.weebly.com/uploads/1/3/1/3/131380487/lijibunuwiku.pdfIn PDF document text
    • http://roboludawu.mywebcommunity.org/gifagixibivazibigojasi.pdfIn PDF document text
    • https://zesijedoroge.weebly.com/uploads/1/3/4/3/134372038/d3360239.pdfIn PDF document text
    • https://zunepijubu.weebly.com/uploads/1/3/3/9/133986973/tazel.pdfIn PDF document text
    • https://cdn.sqhk.co/xewazolefozu/jgiD3Mv/dibasic_calcium_phosphate_anhydrous_use_in_tablet.pdfIn PDF document text
    • https://wimupajano.weebly.com/uploads/1/3/4/6/134682998/jekagopoko-tobaruzep.pdfIn PDF document text
    • http://kosonetibekub.medianewsonline.com/logagagirapi.pdfIn PDF document text
    • https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/nujidama.pdfIn PDF document text
    • https://bidopafogusiw.weebly.com/uploads/1/3/1/0/131070115/8959268.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/how_much_is_2015_toyota_camry_in_nigeria.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE574 5280 bytes
SHA-256: 7584415c799e0b46adb1290347a6a5d8973d984850123907256a3df40900ee8e
font_01_sfnt_off0000f727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF727 1716 bytes
SHA-256: d7ea1fcb56881155405295582d78bbd7a96c40251f9b7d9bd0874708c9c87c0b
font_02_sfnt_off0000ffb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB0 13452 bytes
SHA-256: a7b26c07f7aa99269dfeaff80f625c15bef9eccf54aeb4be7756cb89456d8bfa

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