Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f2bc48490e1ea6…

MALICIOUS

PDF

75.6 KB Created: 2021-02-04 08:04:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0736c449246a782d6d2d3cacaa3ddb61 SHA-1: 1049d5e041e76f7a9e9a19d3dbc42e869a660ec9 SHA-256: 57f2bc48490e1ea632e72a9a960feb6d83bcb30cffadc31b61632b4eb58c100e
244 Risk Score

Malware Insights

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

The PDF contains a lure related to Android Google Play services, directing users to malicious websites. Heuristics indicate a link farm designed to redirect users, with one critical finding pointing to known malicious redirector infrastructure. The presence of numerous links and the nature of the lure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/aws?utm_term=android+google+play+services+won%2527+t+update In PDF document text
    • https://riganekonima.weebly.com/uploads/1/3/0/8/130874133/e79c69d6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377662/normal_5feb49afd136e.pdfIn PDF document text
    • https://bifixebuwo.weebly.com/uploads/1/3/0/7/130776276/2ee364096644.pdfIn PDF document text
    • https://sadozilodefizon.weebly.com/uploads/1/3/4/6/134659806/cf0f9a5d9dc0e8.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/3af43af467ffac0.pdfIn PDF document text
    • http://nekemepomisares.22web.org/85046785586.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452861/normal_5fcf1601b6150.pdfIn PDF document text
    • https://zopiwaseka.weebly.com/uploads/1/3/0/9/130969839/sudewav.pdfIn PDF document text
    • https://jokuduzasaru.weebly.com/uploads/1/3/1/3/131381103/mojexenu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425759/normal_5fee7da640cc5.pdfIn PDF document text
    • http://nawitovafoxuw.22web.org/area_and_perimeter_of_semicircle_worksheet.pdfIn PDF document text
    • https://vurabagugodemox.weebly.com/uploads/1/3/1/1/131164039/kulebalo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezatavaveb.epizy.com/jibiwidisopati.pdfIn PDF document text
    • http://siripuxem.rf.gd/39110819277.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/28325068123.pdfIn PDF document text
    • http://bubomikofar.epizy.com/82539790479.pdfIn PDF document text
    • http://zapofekeba.rf.gd/32298295723.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_off0000ea8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8E 5520 bytes
SHA-256: 897408c1e1dd8b8d1ad44fde1d5972df5074f90e6457202ee1466a494a9c2bb2
font_01_sfnt_off0000fd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD90 10320 bytes
SHA-256: 3767c0f62e3bf8a2d78f38e0dac50c2906ad33cba5bc7a4f9f6e6e738b726029

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