Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd1604aeca02954…

MALICIOUS

PDF

77.8 KB Created: 2021-01-24 07:23:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1f536ce052c004b5953513ad04de00a8 SHA-1: 7413132960f47f23dc0b2d564add42e52af43e5b SHA-256: 7bd1604aeca029540beb047a393f5aaa3a853896607a671608009bb78d325ae5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a phishing or malware distribution attempt.

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 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.
  • 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://maypoin.ru/123?utm_term=chapter+16+solutions+chemistry+answers PDF link annotation
    • https://xewaxamuroz.weebly.com/uploads/1/3/4/5/134529724/8332346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371543/normal_5fcf1e0f7840d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413362/normal_5fcb42873e388.pdfIn PDF document text
    • http://barurizex.iblogger.org/33430530688.pdfIn PDF document text
    • https://site-1217191.mozfiles.com/files/1217191/geragigoxonejumixula.pdfIn PDF document text
    • https://site-1235418.mozfiles.com/files/1235418/buncombe_county_tax_information.pdfIn PDF document text
    • http://fotogodopuxet.iblogger.org/free_printable_charts_and_graphs_worksheets.pdfIn PDF document text
    • https://site-1218990.mozfiles.com/files/1218990/aep_report_power_outage_columbus_ohio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_600aadb330f09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://luvibiw.epizy.com/davovagexet.pdfIn PDF document text
    • http://zakifatuvosi.rf.gd/fafekemafijexeluxaraxa.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/n3_lewis_structure_with_formal_charges.pdfIn PDF document text
    • http://dijinisefiregot.rf.gd/nav_durga_aarti_song.pdfIn PDF document text
    • http://rupevisa.epizy.com/didiwa.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_off0000e476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE476 5476 bytes
SHA-256: 6cef600f791ae441e6ee70ced174ee41e8154fca9a03ccd11a31164b142f9f33
font_01_sfnt_off0000f707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF707 10976 bytes
SHA-256: f75746510d545ffd9504d43a320ba49a1f0e909c44456cc37b295437eb122aea
font_02_sfnt_off00011bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.