Malicious PDF — malware analysis report

Static analysis result for SHA-256 f98a11f2aa0312fa…

MALICIOUS

PDF

64.7 KB Created: 2020-10-25 22:35:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a9a5412043ea4f8c767cea30094c9867 SHA-1: f80d79bbd82af416fc917944806c591f7dfe131d SHA-256: f98a11f2aa0312fa43488e63d39d9e6915bd363c8f859440e0b0153f5061261a
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.me/pify?keyword=ulala+idle+adventure+warlock+pet+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_5f90b95303600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380527/normal_5f95648963e3f.pdfIn PDF document text
    • https://zalawevovupat.weebly.com/uploads/1/3/0/9/130969727/49d29d9e65.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/6502977.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/3067697.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/powobisel_daxovelekifadad_bafelitom.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/93c8420a430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_5f8d9873cfda4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f906886857a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378607/normal_5f8d2035938e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5f902ffa6f9ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388406/normal_5f94573171890.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off000097e1.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off000097e1.bin)
    • https://s3.amazonaws.com/xanebavifamopez/71101034968.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/80396022748.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/finding_square_roots_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/carlo_ancelotti_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/15159401658.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/gijilejufefax.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/fosotiboboromil.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
    • https://savannah.gnu.org/projects/freefont/In extracted file (font_00_sfnt_off00008686.bin)
    • http://www.gnu.org/licenses/In extracted file (font_00_sfnt_off00008686.bin)
    • http://www.gnu.org/copyleft/gpl.htmlIn extracted file (font_00_sfnt_off00008686.bin)
    • http://scripts.sil.org/OFLIn extracted file (font_01_sfnt_off000097e1.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_04_sfnt_off0000dd9d.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_04_sfnt_off0000dd9d.bin)

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8686 6868 bytes
SHA-256: e6d3af836baffaf768c905df5eb6a6601558ea9f33ef1f2c9dc019fcc6d9284e
font_01_sfnt_off000097e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E1 5272 bytes
SHA-256: b20f787325528e5c344d35413ee029b91ab2b984ff3badb4e814d18b06dbdb4d
font_02_sfnt_off0000a9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9E9 2880 bytes
SHA-256: aa71b2eb0ac9ec844ade72b3602b7eb7928c5a92468c025d5239a9b53af5ee9a
font_03_sfnt_off0000b609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB609 12080 bytes
SHA-256: 2121998d8ed2f8c74514be52b153a7f37bccef30d1fbcb195ba1e3c1bbc8bf7c
font_04_sfnt_off0000dd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9D 16448 bytes
SHA-256: 2ea20124bb8b338f98fd9c7b7bedf265b7aaa303f9ce68f0c9bbdd6aab06954d