Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9ec6babebdbc87…

MALICIOUS

PDF

29.4 KB Created: 2020-06-06 06:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 26c581c5d9c42e5dd9f57a9ac1c125fe SHA-1: 103632667af1eacaf038396c605ddd2752e4deb8 SHA-256: ac9ec6babebdbc87870ca24abb32aa796b5e59e3bb476c27fd0c4b0b7fca920f
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam campaign. The document body, though heavily obfuscated, contains text related to 'Hockey lineup cards template' and references the wkhtmltopdf tool, indicating a lure to disguise the malicious intent. The ML_NYX_PDF_MALICIOUS heuristic further confirms the suspicious nature of the PDF. The primary goal appears to be directing users to a network of websites, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://theartprojectjc.com/uploads/1/3/0/9/130969712/130969712.html#hockey+lineup+cards+template PDF link annotation
    • http://way-ward.com/uploads/1/3/1/3/131383767/8408570.pdfIn PDF document text
    • http://cimf1.com/uploads/1/3/0/6/130620963/6f409.pdfIn PDF document text
    • http://smartrecoverymemphis.com/uploads/1/3/1/4/131411245/6b01f1e1.pdfIn PDF document text
    • http://jeffhagemandesigns.com/uploads/1/3/0/6/130604459/wonamawenubopufagena.pdfIn PDF document text
    • http://oathninja.com/uploads/1/3/0/6/130621649/wotin.pdfIn PDF document text
    • http://naturalpeoplecleanfreshandgreen.com/uploads/1/3/1/6/131637308/nezetakuwojujaxafixa.pdfIn PDF document text
    • http://baboinbri.net/uploads/1/3/0/9/130969829/rebavod_pezete.pdfIn PDF document text
    • http://theartprojectjc.com/uploads/1/3/0/9/130969712/terms.htmlIn PDF document text
    • http://theartprojectjc.com/uploads/1/3/0/9/130969712/dmca.htmlIn PDF document text
    • http://theartprojectjc.com/uploads/1/3/0/9/130969712/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kiwunagumif.files.wordpress.com/2020/06/23447872416.pdfIn PDF document text
    • https://zuzelerebola.files.wordpress.com/2020/06/49702562988.pdfIn PDF document text
    • https://bamidepe.files.wordpress.com/2020/06/38529969301.pdfIn PDF document text
    • https://dogoxedetux.files.wordpress.com/2020/06/51707442241.pdfIn PDF document text
    • https://majokefimev.files.wordpress.com/2020/06/3053527495.pdfIn PDF document text
    • https://vilimozerofu.files.wordpress.com/2020/06/wadevuputenutesaro.pdfIn PDF document text
    • https://janadutit.files.wordpress.com/2020/06/8206452594.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B3F 9004 bytes
SHA-256: 778d8576f038a24bdd6963443d92603f60a092a3039d1151f86da31bb313aeb8

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