Malicious PDF — malware analysis report

Static analysis result for SHA-256 96330ddcaab6baf4…

MALICIOUS

PDF

130.0 KB Created: 2021-03-20 21:21:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: de99a9d4a17cc5d0f8eb500d3a130f53 SHA-1: 566dc58c6260d8adffbc8082551ce9c314d023e0 SHA-256: 96330ddcaab6baf4b2b2ebe536b677ef03fba09d6430c9eb0592868bad50ceb2
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 0.9952

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://mezovuduw.ru/award?keyword=burj+khalifa+foundation+details+pdf PDF link annotation
    • http://mapenibo.scienceontheweb.net/sesapusivulunafeko.pdfIn PDF document text
    • https://lutividagij.weebly.com/uploads/1/3/4/8/134896544/4d6a85c6.pdfIn PDF document text
    • https://funavekun.weebly.com/uploads/1/3/0/9/130969801/vazoxijaratobivite.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/1407680.pdfIn PDF document text
    • https://suxaposalepet.weebly.com/uploads/1/3/4/6/134677753/vegizewob-firalezafisigo-tofupilosutafox-bexaf.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/jukewarasizapi.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/cbema_curve.pdfIn PDF document text
    • https://nawobelif.weebly.com/uploads/1/3/5/3/135307193/9524844.pdfIn PDF document text
    • http://jepisafidezegun.scienceontheweb.net/how_to_set_up_audiobox_usb_96.pdfIn PDF document text
    • http://ruvujagefeko.mygamesonline.org/19992230048.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/convert_to_word_online_gratis.pdfIn PDF document text
    • https://kukefilatisila.weebly.com/uploads/1/3/4/4/134498126/3100388.pdfIn PDF document text
    • http://mateguwokalidub.getenjoyment.net/does_graco_snuglock_work_with_click_connect.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/riwokavutifaro-mukiw.pdfIn PDF document text
    • https://kobamaputoruv.weebly.com/uploads/1/3/1/4/131409310/c2cc666f32.pdfIn PDF document text
    • https://buzixigadojaw.weebly.com/uploads/1/3/5/3/135316262/52b0a835806a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1686e36-89f7-4095-88a7-c7de9e77fa02/tosuwonidumuz.pdfIn PDF document text
    • https://b66a6cc6-7028-4fd7-9d19-084b2b27c535.filesusr.com/ugd/4015cf_e09ef6e24ad64bcfa09996f51aff3028.pdf?index=trueIn PDF document text
    • http://masemipeba.myartsonline.com/la_caida_de_tenochtitlan_unam.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/71786792763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d68b6748-865a-4897-a2f4-fee7374d8b00/how_to_use_fabric_steamer_conair.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/is_a_sun_living_or_nonliving.pdfIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_febe6d07972c4ea893319f62592072c5.pdf?index=trueIn PDF document text
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_41c3d17b2bfa4feb96271bc330b61bc4.pdf?index=trueIn PDF document text
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_66a5ac8f3cb54c1a83fc2f1a309afe3b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e5df53-fa76-4182-ad3e-eb0827a6446b/kinodofivejexete.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A347 5320 bytes
SHA-256: dcfaa3cbca5cc5a4ffae23fa2f103d04f2c9995cdfef648abf766ee6cd4a44fb
font_01_sfnt_off0001b561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B561 13240 bytes
SHA-256: 283441f0993e94fdee2a5a87a802d61e7e92689f0391dd8592d0d1e05f900344
font_02_sfnt_off0001e222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E222 16936 bytes
SHA-256: cc3d5ad1a0899fa6c178d6ce4c8240f7f2cbe023af840013b4a78af5b3e57a85