Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc29b4d512a8b7c5…

MALICIOUS

PDF

55.4 KB Created: 2020-10-10 23:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f12706a25ad4c36c8b59b8aade6a233e SHA-1: 7c0aba10bd78ae947868093da101005c687e2138 SHA-256: fc29b4d512a8b7c5cb152e59addfed6a547bf0f88f5d921b13b24d32dcb0210d
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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.
  • 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=mountain+ash+tree+leaves In PDF document text
    • http://rolunonak.barbarascottwriter.com/uploads/1/3/1/8/131857966/xawokoz-tamuwutidi.pdfIn PDF document text
    • http://files.abc-tokyo.com/uploads/1/3/1/4/131438077/8555758.pdfIn PDF document text
    • http://lijof.dump-trailer-rentals-palmbeach.com/uploads/1/3/1/6/131636727/08793.pdfIn PDF document text
    • http://files.sompbags.com/uploads/1/3/0/8/130814132/rovanebelufilet_bejojubos_wuwulamalufej.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/1/0481/7987/1911/files/nutaku_unlimited_coins_apk_no_survey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/how_to_sign_apk_file_windows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7052/0470/files/xekoxifavodowegatebogaged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aaa2884-4498-4afc-99a8-31580f031455/virimuligidafisiwokomaki.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_off00009bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB5 4840 bytes
SHA-256: 9643930e1f5ddb5826c12cb7d0b39aa9b8980ee98741416f611417456e2b7cf1
font_01_sfnt_off0000ac2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC2E 10772 bytes
SHA-256: feeb371518a6327ec2e844234fb5639ce56c73bdb2a9e2cba5ba552fbe0cc03c