Malicious PDF — malware analysis report

Static analysis result for SHA-256 364e1705bc55dfa7…

MALICIOUS

PDF

72.8 KB Created: 2021-04-04 17:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6fe70f5f24265b9c5c5aa30cbf283ac3 SHA-1: 7e62b270da56818ea696746a63fc90c3ad7db0f5 SHA-256: 364e1705bc55dfa714c5720453fa93146347e716872115032b409bd36001a55b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links points to a URL that appears to be part of a malicious campaign, while others are confirmed benign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 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.
  • 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://botokaw.ru/strik?utm_term=brother+hl-5450dn+drum+light+flashing PDF link annotation
    • https://govoxarenaja.weebly.com/uploads/1/3/4/8/134874143/nipexumetumaf.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/jgOULlR/descargar_zombie_infection_gameloft_para_android.pdfIn PDF document text
    • https://todonuratalojin.weebly.com/uploads/1/3/4/6/134605818/f4433fac9.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/e8bibAo/99296249863.pdfIn PDF document text
    • http://fufexak.22web.org/93190319229.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/hciheia/vojaseposepuxipu.pdfIn PDF document text
    • https://cdn.sqhk.co/kajemuwasutu/5ij7Kxv/gefijenoxugetesazekibovu.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/hMVjjje/switch_pro_controller_light_around_home_button.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/eidCOib/gegelomiruw.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/biaiije/ark_survival_evolved_pc_server_hosting.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/cM1RPhe/jepemezad.pdfIn PDF document text
    • http://rowajenuw.iblogger.org/cyborg_android_difference.pdfIn PDF document text
    • https://cdn.sqhk.co/solaxutom/jEMRASz/18875974465.pdfIn PDF document text
    • https://tikodukika.weebly.com/uploads/1/3/0/7/130776738/647199.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/bjiiggf/number_word_cookie_cutters.pdfIn PDF document text
    • https://wazexusevawixi.weebly.com/uploads/1/3/0/7/130776334/f897772d9b88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/monesawugitoxodex.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/murat.pdfIn PDF document text
    • http://vawerixudebaf.rf.gd/huffy_cruiser_bikes_20_inch_24_inch__26_inch.pdfIn PDF document text
    • http://fenulujexita.epizy.com/kebulibokak.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/koreze.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/racq_caravan_insurance.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/panorama_del_nuevo_testamento_benware.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/33120321403.pdfIn PDF document text
    • http://kemosataguta.epizy.com/pujux.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/kenwood_kdc-x399_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/bojelogoberemefevepoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/zakavig.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_off0000db9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9A 5756 bytes
SHA-256: 3943ae6408c4acbd481fceb07fdc541d45f78114bc7e655cf8d4609f154b6009
font_01_sfnt_off0000ef18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF18 10600 bytes
SHA-256: 5ad5121dd5e87be45cc6350925bbbb5c6cecb0b4d7d2fbafff663b253f003c80

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