Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac226f0bcce2f1c…

MALICIOUS

PDF

46.7 KB Created: 2020-10-07 11:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 99f17be166d38c60cd3e04d89aa9a40c SHA-1: c819f5674dd8d69a68deca5160b8575c57f023ac SHA-256: cac226f0bcce2f1c3d2c9310abe40714aaa25d3fd6058ebba8c398419871a413
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://ggtraff.ru/pify?keyword=apex+legends+hackers In PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/14603353904.pdfIn PDF document text
    • https://site-1041949.mozfiles.com/files/1041949/mukawuvomanujub.pdfIn PDF document text
    • https://site-1039492.mozfiles.com/files/1039492/mukuxugupav.pdfIn PDF document text
    • https://site-1043324.mozfiles.com/files/1043324/vijaja.pdfIn PDF document text
    • http://memuli.capescottandthenorthcoasttrail.com/uploads/1/3/1/4/131437987/fenabazavaxo.pdfIn PDF document text
    • http://dilera.dragonflycoulee.com/uploads/1/3/2/7/132710780/48ec094.pdfIn PDF document text
    • http://files.inconcretedesign.com/uploads/1/3/1/3/131384070/zijevelis.pdfIn PDF document text
    • http://xaxorotux.genessajackson.net/uploads/1/3/1/3/131378932/monululibowazepokari.pdfIn PDF document text
    • http://files.mattsuper.com/uploads/1/3/2/6/132682039/472314.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/volop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7757/5860/files/73093490547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/how_to_hide_gridlines_in_excel_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8876/7896/files/bifobolokija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d5b2ee-8913-4949-aaab-a206c20b419c/22598139846.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_off00006162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6162 5456 bytes
SHA-256: fae1c08b5c68fd7ddc6752b4ba45f50ebd1f7d104def029ea7df29ffdebade54
font_01_sfnt_off000073f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F1 10744 bytes
SHA-256: f2bf76352af91d98ea1f77dce06a84e56bf36e2bb13b43ee60d9ea7879847032
font_02_sfnt_off000098e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98E6 16168 bytes
SHA-256: 8c1e3298cb301b6aa2c2aeff0a89e1cafee6626e56d5ffa98ad52a7598c40df9

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