Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68929f70c11200d…

MALICIOUS

PDF

42.2 KB Created: 2020-10-30 20:58:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 754f4aa62690b3195937442ef8ec4e72 SHA-1: 3ae7ba597df6e5c989406e0c01de4426d683c170 SHA-256: c68929f70c11200d02634cbc4e3fe8fb4cee267b190a943bc98bae9be69f5112
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://cctraff.ru/pify?keyword=media+politics+a+citizen%2527s+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f8852942023d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392656/normal_5f978bdf41f21.pdfIn PDF document text
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/fece4d6d3f771.pdfIn PDF document text
    • https://dutedurelixuvu.weebly.com/uploads/1/3/4/3/134320021/mirumule_wefujawividi.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/4618019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f871d7588f77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_5f92cf1043224.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/mefilanube-sijajof-nuralenutuduz.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005072.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005072.bin)
    • https://cdn.shopify.com/s/files/1/0268/9158/3679/files/88476155973.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/38364494011.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/pcg_almanac_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8303/1237/files/dubemisil.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 extracted file (font_00_sfnt_off00005072.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off00008719.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off00008719.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5072 5232 bytes
SHA-256: 9e5e8f8f6714e12b46b6339d1b8c5dfccac11b75a05e9afed1a1ecc8eb5e8602
font_01_sfnt_off0000626c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626C 10684 bytes
SHA-256: 73b5ba34b82dbade0a0f424d82dd1af1bc9fde7a840302639d11d9b276ca0658
font_02_sfnt_off00008719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8719 16064 bytes
SHA-256: 49bd45ccc3726cf27e1247f94abf90f7b723d13bb71b293ea1adf6bb4ae2b6d8