Malicious PDF — malware analysis report

Static analysis result for SHA-256 089a4f874ad7b011…

MALICIOUS

PDF

95.8 KB Created: 2021-02-20 17:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: fe45eab16a77471ea909a83274d39b53 SHA-1: bc8f44f1e54c24d4a628b15bf7214e4a5c8db4d0 SHA-256: 089a4f874ad7b01126e792023f160b4e35fd43394e4b142a4033798282f1200a
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, with one prominent URL being https://bologen.ru/wix?keyword=american+dream+in+the+past+and+now. This heuristic, combined with ML and ClamAV detections, strongly suggests malicious intent. The document's structure and embedded links are designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

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://bologen.ru/wix?keyword=american+dream+in+the+past+and+now PDF link annotation
    • https://litemavokof.weebly.com/uploads/1/3/1/8/131871991/bijapoja.pdfIn PDF document text
    • http://zipufofofize.22web.org/28333993100.pdfIn PDF document text
    • https://newafiramolik.weebly.com/uploads/1/3/1/0/131070062/6455229.pdfIn PDF document text
    • https://zudobusida.weebly.com/uploads/1/3/5/3/135330479/3809555.pdfIn PDF document text
    • https://pugotaba.weebly.com/uploads/1/3/5/3/135302821/wajoxizes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480145/normal_601100524d8d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418985/normal_5ff9ceaf66396.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/xoguwavosuje/transaction_log_shipping_status_report_query.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/58980961346.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/93648242268.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/fumuwelifujenuzapowusu.pdfIn PDF document text
    • http://sosejelufati.epizy.com/phototrophic_bacteria_book.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/pleural_effusion_ppt_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/xorexuxadojulatonotawu.pdfIn PDF document text
    • http://telagivepovadul.epizy.com/dundas_peak_fall_color_report.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_off00013a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A09 5360 bytes
SHA-256: 77c546e9964326a733bbfc382816af2f0ef995d8c3353351644585e81447fcd0
font_01_sfnt_off00014c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C25 11152 bytes
SHA-256: 17ede2ac76efc46884a6a329b617fcdad7cad7d94acdec5ebacc164bb87ded92

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