Malicious PDF — malware analysis report

Static analysis result for SHA-256 09fc7702083f8ba6…

MALICIOUS

PDF

111.1 KB Created: 2021-03-18 14:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c0af2591a8df57a4ac6315724d58bc0 SHA-1: d4b9a2cc067677dcb807f36debbdb77dff16dc8f SHA-256: 09fc7702083f8ba64e8924ef38205a04d933e5cefbb4b2e65491734e42981a7a
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or a distribution mechanism for malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/123?utm_term=akurate+dsm+manual
    • https://xegafifa.weebly.com/uploads/1/3/0/7/130776616/a986ac83c169.pdf
    • https://defaxudenuged.weebly.com/uploads/1/3/5/2/135293647/zabuwufuba.pdf
    • https://mevidumufodu.weebly.com/uploads/1/3/2/3/132303219/9431627.pdf
    • http://tokesuditetu.getenjoyment.net/mabedikotifijoj.pdf
    • http://jevafurevozu.mygamesonline.org/9852072278.pdf
    • https://manujemupofux.weebly.com/uploads/1/3/0/7/130738512/godorufagawine.pdf
    • https://nudilosi.weebly.com/uploads/1/3/4/5/134527742/6125259.pdf
    • https://wefanuku.weebly.com/uploads/1/3/4/6/134611064/78355.pdf
    • https://mivojunap.weebly.com/uploads/1/3/4/7/134720575/51687d5b03c7.pdf
    • https://julamebuviweto.weebly.com/uploads/1/3/4/5/134509829/jegewiligove_milupakojiguz.pdf
    • https://kilifunilazavef.weebly.com/uploads/1/3/4/4/134481566/sukulatum.pdf
    • https://xotizirew.weebly.com/uploads/1/3/1/8/131855992/sizexipejixusizosu.pdf
    • https://pudexaxetodeli.weebly.com/uploads/1/3/2/6/132683251/ramuzuvawerikox_jukix.pdf
    • https://saboruxeketeg.weebly.com/uploads/1/3/4/8/134850947/lakivivur_biwulatoxi_galozis.pdf
    • http://sevibifodome.getenjoyment.net/tim_grover_relentless_book_review.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_8affe9e79e4947dca3e2456e2621d8f5.pdf?index=true
    • http://kafotafuvodalix.onlinewebshop.net/nikumozoputubosobodapo.pdf
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_0de0b77b94db4da399cd7c8129611145.pdf?index=true
    • http://nukilaba.myartsonline.com/xapuviginajonixifenut.pdf
    • http://sulenovigadi.myartsonline.com/xoxoxigamebagokojedekabu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001348a.bin
08ea7f85816fd8e2304fb34e43bbd7afeff4a739e97482e4473ce94e645080b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1348A 11852 bytes
font_01_sfnt_off00015c12.bin
289a6b309d4d76307d228b455e8c9ed5c894d0a8f46501884e7aebb68a589fa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15C12 5024 bytes
font_02_sfnt_off00016d0f.bin
02da55609657d1ad63aa650faf265dc5ff6dbfe0166a3d0d45bffec5af18ee3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D0F 13160 bytes
font_03_sfnt_off000197e1.bin
25a5e6c7c9cd73e1730f271d334b71b3c0ac6385951e3737251623a68d8eef5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x197E1 16160 bytes

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