Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc62808800533f28…

MALICIOUS

PDF

75.7 KB Created: 2021-03-25 03:39:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 400d675febc71e89b261bcb0a7330841 SHA-1: eb82b0d6248a4edf74063f7d1dd8be385cafee63 SHA-256: dc62808800533f28a1fae72c3cb00be738adbd96d8a385efdda69693e32b0e5b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to an 'Ibps guide october current affairs quiz'. The presence of numerous external links indicates an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://fokemale.ru/123?utm_term=ibps+guide+october+current+affairs+quiz PDF link annotation
    • http://tebiweja.iblogger.org/57534137510.pdfIn PDF document text
    • http://in-step.shop/57673067876wf2py.pdfIn PDF document text
    • https://linepapimufuto.weebly.com/uploads/1/3/1/6/131637640/wagazaf_kajuvabofovo_ribogo.pdfIn PDF document text
    • http://sellforce.ru/problemas_para_nios_de_tercer_gradoywfoq.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/4134893.pdfIn PDF document text
    • https://manabuvajej.weebly.com/uploads/1/3/4/8/134847277/jiruvurawarud_wetagivevizuve_rinigokun_xusedokukij.pdfIn PDF document text
    • https://pavofadibap.weebly.com/uploads/1/3/4/3/134370944/59d685bc6460.pdfIn PDF document text
    • https://xixezowipena.weebly.com/uploads/1/3/5/3/135341666/9618815.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/bivanud/gina_classification_of_asthma_severity.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/see_information_below_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/isolde_s_liebestod_sheet_music.pdfIn PDF document text
    • http://tugojan.rf.gd/netububitagabapevimajasa.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/16222285878.pdfIn PDF document text
    • http://fegafefokijun.epizy.com/would_you_rather_thanksgiving_questions.pdfIn PDF document text
    • http://fafezevasuba.rf.gd/90830914835.pdfIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_1d9ef10be4a647a08746d7672d8f3fdf.pdf?index=trueIn PDF document text
    • http://xetuvekena.epizy.com/change_in_mood_song_lyrics.pdfIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_0194a2dc0ba74b23b022ad8e343ff952.pdf?index=trueIn PDF document text
    • http://zevizajezu.epizy.com/react_native_stylesheet_flex.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_off0000eaa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA7 5544 bytes
SHA-256: 29272493b7266ceec165f2de3a97cf931a942f51a4963212ae68c04c55d84d13
font_01_sfnt_off0000fd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8A 10464 bytes
SHA-256: c74b055a5c0a06e03917273beff964ad572656f9d66084832f25df5b6485df52

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