Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee8f46ff8177db5…

MALICIOUS

PDF

73.9 KB Created: 2021-02-12 03:28:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 12a3f400718123f6d41068d436a56e3c SHA-1: 29fdf78558a024d5c3bbd84cecc77bb18f85cb30 SHA-256: 0ee8f46ff8177db5f2f8b3b777968fbc015d42323cac52ed2d9cc195e84abffb
214 Risk Score

Malware Insights

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

The PDF was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link and a PDF link farm. The presence of numerous embedded URLs, many pointing to unknown or potentially malicious domains, strongly suggests an attempt to lure users to external resources. While no scripts were explicitly extracted, the PDF structure and the nature of the heuristics indicate a likely phishing or malware distribution attempt.

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
  • 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://yafferge.ru/wix?keyword=medidas+de+cancha+de+basquetbol+para+ni%25C3%25B1os In PDF document text
    • https://xexafuru.weebly.com/uploads/1/3/1/0/131070851/dorad.pdfIn PDF document text
    • https://mozipode.weebly.com/uploads/1/3/1/4/131437967/molovorukuzax.pdfIn PDF document text
    • http://vejefulolite.22web.org/asynchronous_transfer_mode_atm.pdfIn PDF document text
    • http://xinupavob.iblogger.org/20150539711.pdfIn PDF document text
    • http://pusikoxelumide.iblogger.org/new_bhojpuri_video_song_hd_free.pdfIn PDF document text
    • https://lewozokor.weebly.com/uploads/1/3/5/4/135400983/ripomi.pdfIn PDF document text
    • https://cdn.sqhk.co/mofisozulud/RtWgdjg/kikabeminasubima.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/babuxufarizuxur/13301093503.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/macys_bedding_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/jadanedazulubanewi.pdfIn PDF document text
    • http://fepadegan.epizy.com/34624529259.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/wisajivozoziv.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_off0000e08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08A 5644 bytes
SHA-256: 5739ac38597787ca41c0abb386dce0d58a054ebfc131e2dddb225cb413147536
font_01_sfnt_off0000f371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF371 11384 bytes
SHA-256: 6b007a4e058c74ed996713dbe6bce9ce70dddc7e1af70cad4ece5fdab2d8a23f

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