Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf97badeeb57d4c…

MALICIOUS

PDF

78.1 KB Created: 2021-04-01 06:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a90687024dde256e3d1530d1293a30fa SHA-1: 5066df51cab081b4f5e2f841c80e3a735fc6f248 SHA-256: fbf97badeeb57d4c547ab38dbb4d633f3242c5d82b9b7be94c94091355df1c32
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://baarspo.ru/award?keyword=psychology+class+12th+pdf PDF link annotation
    • http://bagezokazuraw.medianewsonline.com/baciloscopia_tuberculosis.pdfIn PDF document text
    • http://vetovikaxu.mypressonline.com/fekapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422377/normal_603f70c9b71cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_6050639452e2e.pdfIn PDF document text
    • http://nutusugeralinet.mypressonline.com/fuloburutunon.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/FUTLiea/83830128416.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471082/normal_5ff45e9885e18.pdfIn PDF document text
    • https://cdn.sqhk.co/porekige/5maPMhj/96233115666.pdfIn PDF document text
    • http://joriwolujuf.sportsontheweb.net/muxaxa.pdfIn PDF document text
    • https://petuxomurekag.weebly.com/uploads/1/3/0/8/130874153/ccdbac3751167.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/icMGAhd/dolureruxogumiwemosixib.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/warm_bodies_streaming_sub_ita.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/96128473168.pdfIn PDF document text
    • https://ralunudedosamot.weebly.com/uploads/1/3/4/8/134856058/wimikakerinapu-buvufadan.pdfIn PDF document text
    • http://vudasuti.mygamesonline.org/xogiwogexedulodidumiduju.pdfIn PDF document text
    • http://movizopolu.medianewsonline.com/48787439503.pdfIn PDF document text
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/1498773.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/bhGietd/oxygen_element_symbol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458145/normal_5ff0dfe1e959b.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://kovumakujibero.rf.gd/kelly_services_careers.pdfIn PDF document text
    • http://nukowuvitog.epizy.com/aircraft_performance_and_design_anderson_free_download.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_off0000e6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 5124 bytes
SHA-256: 3c0c4ebd3dddadd67e8a1911b313a7f20b4aca9a2ecf3570275421a192621030
font_01_sfnt_off0000f866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF866 10760 bytes
SHA-256: ba5af678104fd71dd24b55d90e7074f790ea84863643ed377a487e88aff285a7
font_02_sfnt_off00011d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D15 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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