Malicious PDF — malware analysis report

Static analysis result for SHA-256 2235ab082456722b…

MALICIOUS

PDF

68.8 KB Created: 2020-12-24 13:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ad52eba7f869c3d16ecdc954829adc5b SHA-1: d7a813309601afadaacaf9221a704b592e26c790 SHA-256: 2235ab082456722bfab8dc9c34fe69fd51ddd9087abc72bfbc14003dd91ed9ba
214 Risk Score

Malware Insights

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

The PDF file contains multiple links to external websites, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'Alcohol use disorder dsm 5 criteria pdf'. The presence of numerous PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffking.ru/aws?utm_term=alcohol+use+disorder+dsm+5+criteria+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4486051/normal_5fe2103e7a986.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492555/normal_5fe42d1ad59d0.pdfIn PDF document text
    • https://fexiragija.weebly.com/uploads/1/3/1/4/131409693/5c3ee5.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
    • https://s3.amazonaws.com/megodipewukitoj/95025528422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62023465-5d76-4e70-9b07-f61bab77f083/95011294881.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/brevini_gearbox_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/riwoj.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/nefupuxalisesutitekewa.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/dodge_durango_repair_manual_download.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/88947752460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24609bdf-4355-4421-8f18-da1c635776ef/the_breaker_anointing_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6a4e470-4775-42e2-a44e-808b68b1024f/52496651023.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/binary_multiplication_rules.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_off0000c01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC01E 5284 bytes
SHA-256: aa8e1d734f6b3db6eaace30cd98566c0f57b4e6152908e736f498eafa2ce56cb
font_01_sfnt_off0000d212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD212 11252 bytes
SHA-256: de82276d6f0dd8b1d594943aca33161335ae65971b2f13b8edaf0211fc6b3b15
font_02_sfnt_off0000f851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF851 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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