Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcdc238e13434fef…

MALICIOUS

PDF

67.7 KB Created: 2021-03-27 17:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1af5e929e1247feb57d8b46bb05874f1 SHA-1: 77b04548c67ed7de6016eb832f19c542a9579b7a SHA-256: fcdc238e13434feffa2cfb147947a0d239cabf939d9f07708db6be1e222946f6
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or content-luring scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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=babylon+mystery+religion+pdf+free+download PDF link annotation
    • http://tekeriset.iblogger.org/80556190333.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413346/normal_60082dea59962.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476750/normal_5feea63658bfd.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/digunipolevunapidujux.pdfIn PDF document text
    • https://vejarava.weebly.com/uploads/1/3/1/0/131070596/9c155.pdfIn PDF document text
    • https://xujuwoxevosu.weebly.com/uploads/1/3/4/8/134896670/xigozol-zalojisam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453142/normal_605f2b2cd655e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365540/normal_5fe2d30bc4902.pdfIn PDF document text
    • https://mudujisobugabe.weebly.com/uploads/1/3/4/5/134511382/vutinusomanonow-fuvizo.pdfIn PDF document text
    • http://xuvaguwanolinu.66ghz.com/venozovesoxorixowe.pdfIn PDF document text
    • https://tofixotiz.weebly.com/uploads/1/3/4/6/134621190/a9a0f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mepumubim.rf.gd/najasuzetizitawababedud.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/dead_silence_1997_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef016a46-653d-4179-929e-43e3589b57f7/puretajig.pdfIn PDF document text
    • http://nuxebezojav.epizy.com/blog_template_html_php.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe37a1ea-cc0a-45ce-bf5f-0ead0edc5633/escuchar_la_biblia_catolica_online_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/65376926018.pdfIn PDF document text
    • http://rivekutunuji.rf.gd/vibodeturavijova.pdfIn PDF document text
    • http://jafedave.epizy.com/47643880363.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/zegugaseketetufi.pdfIn PDF document text
    • http://nuzijerasa.epizy.com/how_to_remove_cd_stuck_in_bose_wave.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/nefozitasexonuwutopelana.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_off0000ca2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2F 5744 bytes
SHA-256: 71cd85d64f78a467d7a0a70de79de5f9f2e9705fe90a32336bba12889dd29bd4
font_01_sfnt_off0000ddb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB9 10448 bytes
SHA-256: 00ced9b84b38c4865fae7ba5093219d9448b6249639b645f18aa8fbfd128e6e4

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