Malicious PDF — malware analysis report

Static analysis result for SHA-256 2986494da5b1760e…

MALICIOUS

PDF

83.7 KB Created: 2021-05-07 13:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 02524df04805c5ca5211bcc3f53c9825 SHA-1: 7ea2c2768f62ca7e1d71527b74c4be10be4e5932 SHA-256: 2986494da5b1760e4d31a03f404a7f3d8bda5b7cde67f130a03c74e3535fe0b0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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://xajibur.ru/strik?utm_term=canon+powershot+a1200+hd+manual PDF link annotation
    • http://hs-life.ru/bamutegotamolukefh4xiq.pdfIn PDF document text
    • https://nojonepidafajik.weebly.com/uploads/1/3/0/7/130775859/gebeb.pdfIn PDF document text
    • http://presentinsta.online/vivint_smart_thermostat_manual6io3m.pdfIn PDF document text
    • https://daxixerok.weebly.com/uploads/1/3/4/0/134000062/6193493.pdfIn PDF document text
    • http://tejasatobes.medianewsonline.com/51675109680.pdfIn PDF document text
    • http://byseles.xyz/69227848555t3fjw.pdfIn PDF document text
    • http://agentsoft.space/bitter_moon_full_movie_in_englishzg2zz.pdfIn PDF document text
    • http://regvoolkim.website/98745187836u1ah9.pdfIn PDF document text
    • http://depalowivejal.iblogger.org/42423909696.pdfIn PDF document text
    • http://thrivewebs.com/kegelidubpbi9.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/advanced_vocabulary_words.pdfIn PDF document text
    • https://diwifiburu.weebly.com/uploads/1/3/4/8/134871147/senip.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/369552.pdfIn PDF document text
    • https://zobatovegu.weebly.com/uploads/1/3/0/8/130873738/pulazu_jobunisejiba_kuledolerifom_dafoli.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/apostrophes_practice.pdfIn PDF document text
    • https://melejorun.weebly.com/uploads/1/3/0/7/130775242/patexiwixix_gudorame_tikomaguve_bepemebowe.pdfIn PDF document text
    • http://braco.ru/bubitewonafua4ld.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/spacecraft_systems_engineering_book.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/six_way_paragraphs3u8sq.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://goproonly.com/79509617583yp2ha.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
    • http://febuzoremasovev.epizy.com/31554836103.pdfIn PDF document text
    • http://moganip.epizy.com/77022041637.pdfIn PDF document text
    • http://kanemotix.rf.gd/biligarebinolu.pdfIn PDF document text
    • http://jagomizaf.atwebpages.com/az_103_book.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_off0000f8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 5476 bytes
SHA-256: bc4a3e10f64b40fb172badcddbde8a760d3c153073cbdd6b892b7dd268c05e79
font_01_sfnt_off00010b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B59 11824 bytes
SHA-256: 965b2d91d2976e5e4e9bb29015e9b5ccd714c89ab2e5646b2cc06de5d93ac1fc
font_02_sfnt_off000132bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132BF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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