Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe22b0cb3efb25c…

MALICIOUS

PDF

81.2 KB Created: 2021-02-26 00:29:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8d3d6663874bd32fc5743e75329e6c00 SHA-1: fbdc826bb1f4e9bca3878d64f8e8d889d500cd33 SHA-256: dbe22b0cb3efb25cf141db35fd2cd43c6ff866176c24688970a5e6e7f501b2f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to seemingly unrelated documents, indicating a link farm for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=the+highwayman+cyberpunk+authorization+not+found PDF link annotation
    • http://tomogorman.com/fizedasadogasanojike8h9qd.pdfIn PDF document text
    • http://voztrans.ru/non_verbal_reasoning_notes_in_hindixefha.pdfIn PDF document text
    • https://gitefitibed.weebly.com/uploads/1/3/5/9/135968717/5544879.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/susarimadotobatojosiqodl9.pdfIn PDF document text
    • http://vanlit.ru/nubowazara8ptat.pdfIn PDF document text
    • https://bogonifad.weebly.com/uploads/1/3/4/1/134108647/9d9d4b.pdfIn PDF document text
    • https://zisidolig.weebly.com/uploads/1/3/1/3/131379992/newikobenane-timok-narotubomirux.pdfIn PDF document text
    • http://kitufavurakural.iblogger.org/66629497163.pdfIn PDF document text
    • https://litapofigiwo.weebly.com/uploads/1/3/5/3/135349015/torodowovawamutofu.pdfIn PDF document text
    • https://xasufedi.weebly.com/uploads/1/3/4/6/134683860/teken.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/xefejevife/cisco_3750v2_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/hoy_es_dia_feriado_en_estados_unidos.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/nilubabevumusirigiwot.pdfIn PDF document text
    • http://dizoran.epizy.com/current_transformer_amplifier_circuit.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/predator_3500_inverter_generator_specifications.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/55964561385.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/bazefexadovawufew.pdfIn PDF document text
    • http://nareboveridur.epizy.com/disacaridos_caracteristicas.pdfIn PDF document text
    • http://siripuxem.rf.gd/song_bepanah_pyaar_hai_aaja.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/68737585815.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_off0000e927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE927 5756 bytes
SHA-256: 2274bc4dca5ecf6bbd43bbbd845bd31380a2be3c28f5bedd8410cde6feacce4c
font_01_sfnt_off0000fcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBF 10776 bytes
SHA-256: b9093873ec654d34d298cbb7bc5c88f329b373d3bf5a53ebe0a3a3eb9a56c931
font_02_sfnt_off0001215d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215D 16164 bytes
SHA-256: 19830f1e4f67038a7dc608fbb3de26b020266950e6746ee8e8edcf8e16cfe4ea

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