Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d7b5c1ca0be956…

MALICIOUS

PDF

73.1 KB Created: 2021-02-28 04:13:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: af04b4d5eeff699f864dab542b649524 SHA-1: fac9f7394d3f6e6fe63e0acc17369c75ba65459c SHA-256: 94d7b5c1ca0be956f6fc08f7335b008b0f314e19666525bc1e20b9a29208c3f9
134 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document utilizes external URIs and is part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the heuristic indicating a 'download button' lure further support the conclusion that this document is designed to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=the+tyranny+of+merit+pdf+free+download PDF link annotation
    • https://sozazajigosana.weebly.com/uploads/1/3/0/7/130739782/buloguriz.pdfIn PDF document text
    • https://cdn.sqhk.co/sadetujadufi/zjgAagd/minimizer_for_youtube_background_music_apk.pdfIn PDF document text
    • http://kimokabif.medianewsonline.com/john_dewey_educational_philosophy_ppt.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/72241384553.pdfIn PDF document text
    • https://rumarefux.weebly.com/uploads/1/3/1/0/131070750/kepezop-finofekixulubam-fipude.pdfIn PDF document text
    • https://radefikifuru.weebly.com/uploads/1/3/4/7/134723330/f7029dfe18c218.pdfIn PDF document text
    • https://gebezemimubitup.weebly.com/uploads/1/3/1/0/131070169/bccd754c7d11555.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/ibQLuUc/v-_live_houston_right_now.pdfIn PDF document text
    • https://tibiwoxot.weebly.com/uploads/1/3/4/8/134881218/togudamaxana-pidalaset-texanokozel.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/17391088009.pdfIn PDF document text
    • https://fopilifufisi.weebly.com/uploads/1/3/6/0/136055159/jiterebidur.pdfIn PDF document text
    • https://nojokuvevufig.weebly.com/uploads/1/3/4/1/134109253/givux.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/zesixefe/18076050041.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/40174010536.pdfIn PDF document text
    • http://zaniwemikadas.rf.gd/jawituroniwipiw.pdfIn PDF document text
    • http://nasewuji.epizy.com/20178689898.pdfIn PDF document text
    • http://fatesixinubumot.epizy.com/39249635373.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/star_trek_voyager_ship_vs_enterprise.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/jifasabisuzigudanado.pdfIn PDF document text
    • http://buvumitibeve.rf.gd/virerikaliwalenaver.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_off0000e170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE170 5248 bytes
SHA-256: 889dd5867ca7c82044ce9b1ec7630630ecffb89ddf8928a7a45977d7e851a7ec
font_01_sfnt_off0000f337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF337 10468 bytes
SHA-256: 73566f3de9098a2c8639b0f7ad52d93365530fc2b1190c4761a490dfae576227

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