Malicious PDF — malware analysis report

Static analysis result for SHA-256 56320ab30909d98f…

MALICIOUS

PDF

70.4 KB Created: 2021-01-16 16:20:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a81529a4e09e20aef9a8a749f5aca473 SHA-1: bb387636c3c282363c2fc5f7940c123865342c6e SHA-256: 56320ab30909d98f303412fcf4f5ab26cca112876d0f6e72f1e9edc1919ee85c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, with a critical heuristic identifying a link farm designed to redirect users to other PDFs, including one hosted on s3.amazonaws.com. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The embedded URLs and the PDF structure suggest an attempt to exploit vulnerabilities or trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=tripadvisor+enzian+inn+leavenworth PDF link annotation
    • https://vufegolafo.weebly.com/uploads/1/3/0/9/130969987/gaseratewo.pdfIn PDF document text
    • https://site-1224059.mozfiles.com/files/1224059/humptulips_river_fishing_report_2019.pdfIn PDF document text
    • https://xududegugi.weebly.com/uploads/1/3/1/6/131636960/3394053.pdfIn PDF document text
    • https://site-1252280.mozfiles.com/files/1252280/astable_multivibrator_using_transistor_waveforms.pdfIn PDF document text
    • https://site-1218703.mozfiles.com/files/1218703/86642174109.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/35f2ab37.pdfIn PDF document text
    • https://site-1168101.mozfiles.com/files/1168101/the_ordinary_skincare_guide_for_acne_scars.pdfIn PDF document text
    • https://romemigevowuf.weebly.com/uploads/1/3/4/3/134335991/reruxopoxifamo-bogawujugole.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/sefabe/ratutojovezetetuxix.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/dunozawumapusowevaliponud.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/31895200311.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/fuzininotijazabexix.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/57697887393.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_off0000d711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD711 5200 bytes
SHA-256: d3ad8f6e40251e6f2d05065397295524c3bfd7ce8b5581f5597df3dd3aace2bc
font_01_sfnt_off0000e8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D3 10480 bytes
SHA-256: 2c956a18049edef6e3c49a7726a07f71b63f3cc37a9e5f436b1b4603276721f4

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