Malicious PDF — malware analysis report

Static analysis result for SHA-256 8116160834e04e63…

MALICIOUS

PDF

90.1 KB Created: 2021-03-03 13:41:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 47dbdd6e9612ae3843f100eeaac84618 SHA-1: 77fae9cfc0b8a91704111f99a5e0fbdbd920b348 SHA-256: 8116160834e04e63acffb9c016cdf8de43866b6645d2ba8d5759a6f766df73d2
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by both a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a phishing or malware distribution site. The document body contains nonsensical text, suggesting it is a lure to trick users into clicking the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=what+the+hell+did+i+just+read+a+novel+of+cosmic+horror PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386848/normal_5fd1571582215.pdfIn PDF document text
    • http://detonic-romania.website/47266642635zs5xn.pdfIn PDF document text
    • http://sallely.xyz/finutepusipumuwejuniqyt.pdfIn PDF document text
    • http://top-agent.ru/hindu_calendar_2019_hindi_downloadn6j82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_602e256494a1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_5fd64c87c6467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453334/normal_6037dce93972b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nukilaba.myartsonline.com/27340995914.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/tixabotosogemadalobo.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/46929809664.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/dokofedomiroluwas.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/wadutitokuz.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/degoponolomefajejekigepi.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/china_consulate_dubai_visa_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/get_appvalley_for_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BD 7548 bytes
SHA-256: 30701ee0f05dff9d7d52a94321278fa5ad0bcc2c8d59f69ae363ce018033c557
font_01_sfnt_off000121b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B5 5408 bytes
SHA-256: f28d6223dfeb40856e8c21a500cc19529a2794fd9d8f9c92e30875f0620d67b0
font_02_sfnt_off0001340b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340B 10496 bytes
SHA-256: f2f6e07ac11242b0c05358867e7dcbfd15bf1bd3b58ebc5e7d022144be8b06da

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