Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a28f7f873208d2…

MALICIOUS

PDF

50.5 KB Created: 2020-11-07 07:31:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 2448d9f1c6741a847fae04ecc9d322a9 SHA-1: c6ca388ef1aba26b7e05df4d40a988999c452e04 SHA-256: 12a28f7f873208d2580068167c3983cb271c4cff0731639a016234f07f9269fc
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffset.ru/123?keyword=putlocker+movies+far+from+home+spiderman PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f88aca4626f9.pdfIn PDF document text
    • https://fewarajinu.weebly.com/uploads/1/3/4/2/134235366/e75183da3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5f94c57558a0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381766/normal_5f96d1d6b2f93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386091/normal_5f8ff6fb483c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392664/normal_5f8f2c3c135eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f87338bebb4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f8a4eb84f7c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_5fa5c3a43109a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://givolajokofe.files.wordpress.com/2020/11/japatewajaliwififu.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/fizimobaruweboratiweti.pdfIn PDF document text
    • https://lukarilovaj.files.wordpress.com/2020/11/60208760335.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A2 5520 bytes
SHA-256: ad470a023f3f7995970cb50559c195ed825e0a550523d25d21241e61da56bd7a
font_01_sfnt_off00007c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C41 11052 bytes
SHA-256: 6bba9b246127cb42b4a7f135905151e4d6dbca77ab4c0449b9c656b3c804c099
font_02_sfnt_off0000a233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA233 17240 bytes
SHA-256: b94ded77c8074917175858382ba765b6eef076c66878e60b3a381e4f4945277e