Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b6e03a3a9a4a51…

MALICIOUS

PDF

68.9 KB Created: 2020-11-25 15:48:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f0b20e724c69e68df3869ef73f5f18b4 SHA-1: 16380f5d7985cecb39980ea95dcbd1bb478dafe9 SHA-256: 28b6e03a3a9a4a5139165ab7b366906ebd43f663c925fe8ffa76106620066bd9
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://traffnew.ru/strik?utm_term=chicco+pack+and+play+recall, is suspicious and likely serves as a lure for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to malicious content, fitting the pattern of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/strik?utm_term=chicco+pack+and+play+recall PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412780/normal_5f9e53fea444d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5f8e663328197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_5f9c0db32b815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5f9002ae78b90.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/kabisebax/duroxagumunoza.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/sovevusuxufokow.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/18542335308.pdfIn PDF document text
    • https://s3.amazonaws.com/mogelebolep/guxaxiketonabikadom.pdfIn PDF document text
    • https://s3.amazonaws.com/fulomufimikim/nopazukuw.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/dekosonubevanupinamifukin.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/empirical_social_research.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/516256e6-0814-43a5-8d88-8f1e02548d9e/temotetilotumigevilibin.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/heimerdinger_guide_aram.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/boombox_jbl_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/alcoholics_anonymous_1st_step_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/32423316704.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_off0000d113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD113 5056 bytes
SHA-256: 356dfbda7dc3ba4f01a854b90d4a6370a531c570df1d29a7a358b842582db6ba
font_01_sfnt_off0000e240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE240 11140 bytes
SHA-256: 35870c7cde201c49d7d4d40caa45b58a37594b8e4ab1aae10cab6240e18992e9

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