Malicious PDF — malware analysis report

Static analysis result for SHA-256 46625956b9b15a0e…

MALICIOUS

PDF

71.8 KB Created: 2021-01-07 03:14:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5c1461674095ec10f7de6b6d8904ed95 SHA-1: 8cfde775abdcb13c07a3a28ab8fcf59762250a0d SHA-256: 46625956b9b15a0eb4f42f6bd9d48ef8e2cc01a39e67238d5d42a87b6d7aa3fc
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a significant number of external links, suggesting a link farm or redirection scheme. While no scripts were directly extracted, the PDF structure and embedded URIs point towards an attempt to direct users to potentially harmful external sites.

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://traffnew.ru/123?utm_term=allusions+worksheet+middle+school PDF link annotation
    • https://cdn.sqhk.co/tajiwikiter/Wiahalw/space_engineers_wiki_atmospheric_thruster.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/cwZ4hco/12056219354.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/mCwijQQ/rotebelugofuriforijuxib.pdfIn PDF document text
    • https://mebavowu.weebly.com/uploads/1/3/4/3/134353315/4a84cdf0030.pdfIn PDF document text
    • https://cdn.sqhk.co/pininipata/hfgdkgd/best_pc_driving_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/5ijg5ih/19428335469.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/bogeguva/lasawaf.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/jewavorigaxinomexofut.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/58438514671.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/transunion_fraud_alert_free_report.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/xvideostudio._video_editor_apk2019_gif.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/11th_online_admission_form_2018-_19.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/koviradudezowipikod.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_off0000dd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6B 5112 bytes
SHA-256: e1e196c7c01edcf4ade9e31119b7d0d77e1a87e097e082ebc9c4df7c735402e0
font_01_sfnt_off0000eeb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB7 10440 bytes
SHA-256: 27783b6e9bccc1fb9f59a959d5d67652ad8c4a83c38e21a53420d100fc8fe827

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