Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3383e96e14572d…

MALICIOUS

PDF

81.3 KB Created: 2021-04-20 00:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56c448a7f931d9bfc69d6669d86c9e01 SHA-1: aa494ddfa977046e6f586549dc31f8a6a05d1089 SHA-256: 2f3383e96e14572d001071a3b562eeec6a45c267e4bbc127c27bd4e75ac4f5a2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, forming a link farm, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to making money online. The presence of external URIs indicates an attempt to redirect the user to potentially malicious websites for phishing or scam purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=how+to+make+money+in+gta+5+online+ps4+2020
    • https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/pedowutowix.pdf
    • https://romakajesak.weebly.com/uploads/1/3/4/5/134508807/89d1b1fa81f1d.pdf
    • http://uorott.com/fufibiwomijtyf3i.pdf
    • https://cdn-cms.f-static.net/uploads/4472501/normal_6047347920c31.pdf
    • https://pazaduzot.weebly.com/uploads/1/3/4/4/134473777/gabojufezibogat_falulovu.pdf
    • http://vknacruckalaikov123.xyz/6329017580124ts3.pdf
    • http://jusapp.club/55526252555hv8jm.pdf
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5fe9f4ea23509.pdf
    • https://koximewi.weebly.com/uploads/1/3/0/7/130775363/maxuwifov_mifajimux_subade_gewimi.pdf
    • http://everydays.space/audiology_infection_control_plan_templateh50ru.pdf
    • https://dujolisinapujis.weebly.com/uploads/1/3/4/3/134328324/fexuruk_puwilokiju_kobenabaxa_rikije.pdf
    • https://jevogivufete.weebly.com/uploads/1/3/0/7/130738845/84c50635e29f50.pdf
    • http://esclick.pro/bogamemutosanejakejodirauls1i.pdf
    • http://presente-top.store/12368919548espx6.pdf
    • https://dapapakutuluj.weebly.com/uploads/1/3/1/3/131384169/genirip.pdf
    • http://matteset-spon.space/survivalcraft_2_download_free_android2qpoi.pdf
    • http://shopbest.online/best_tablet_for_reading_booksjlaue.pdf
    • http://100naturals.fun/50690317870ghe8x.pdf
    • http://bigno.space/superbike_rider_wallpaperxy20w.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe40.bin
c3c60bf5613aa98a463013bfb132e17495865834600bf73838dbd56cd4f1b12f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE40 5748 bytes
font_01_sfnt_off000111f0.bin
efbea1e433f40c162e527f708ae2df7b46df0d9afe11660549651f33f630c57b
pdf-font-stream PDF embedded font (sfnt) at offset 0x111F0 10984 bytes