Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a16e62c9136cc7…

MALICIOUS

PDF

84.0 KB Created: 2021-04-18 06:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d731a0dfe5083dbdffbe02493ff51fd9 SHA-1: 784a64f4d7954559a7892f407df1dbcc5eba36ca SHA-256: f3a16e62c9136cc7e7726bdb5a8e4d6d61abcdae4f9bc60a6a0c8ee4617e454e
156 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary URL pointing to a suspicious domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://lozipotod.ru/strik?utm_term=the+penguin+roget%2527s+college+thesaurus+in+dictionary+form PDF link annotation
    • http://fexedude.iblogger.org/what_is_bombay_blood_group.pdfIn PDF document text
    • http://xukenevu.22web.org/example_of_resignation_letter.pdfIn PDF document text
    • http://wimesuzajomos.mypressonline.com/honda_livo_bike_spare_parts_price_list.pdfIn PDF document text
    • http://sojipen.22web.org/safari_browser_windows_apple.pdfIn PDF document text
    • http://tavafotuzefox.sportsontheweb.net/zejatebuvaxajimuziniv.pdfIn PDF document text
    • http://rupukimonedekij.22web.org/53685324843.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/vobuturinivi/40635267436.pdfIn PDF document text
    • http://lutaxipokujopej.epizy.com/trading_price_action_trends_by_al_brooks.pdfIn PDF document text
    • http://kanamejalogule.rf.gd/58200099214.pdfIn PDF document text
    • http://rumedisevem.epizy.com/rowibigikinon.pdfIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_45912ddbbbf74dc9b45353be83ae25ca.pdf?index=trueIn PDF document text
    • http://faxarase.rf.gd/clasificacion_de_animales_invertebrados.pdfIn PDF document text
    • http://retesatitogeli.epizy.com/libro_el_arte_de_seducir_sin_palabras.pdfIn PDF document text
    • http://kirawolus.rf.gd/giwekimugono.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/oregon_coast_community_college_nursing_program.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/mitudulonefizigumuku.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/nowonazoxovof.pdfIn PDF document text
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_ee39e29ae0984cddb9ffa369910e7801.pdf?index=trueIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_b9f280492410412f95313282d7448a39.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/bixupakumerujerubidedig.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/dutchess_county_sheriff_accident_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/molaxigaxirerowosibo.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/airline_city_codes_in_india.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_off000107d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D4 5652 bytes
SHA-256: 470d7e509461d724b8ae5fd65fcd5df2ab05cff58714d5dd7798c78ccc018f84
font_01_sfnt_off00011afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFC 10644 bytes
SHA-256: 1eac50d09782adbe1b2310f4809f920ebe242b894e218fc1837191f91c3f48f6

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