Malicious PDF — malware analysis report

Static analysis result for SHA-256 84763eaf8e463404…

MALICIOUS

PDF

65.0 KB Created: 2020-10-27 03:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b55706e70b032b38da55574673b50598 SHA-1: 502d9495bec846c5ed6de0fec8d6907efcbbe91c SHA-256: 84763eaf8e4634048cab2bd49aa62a684681d573ac5d3f4303ac1bb3b09b2735
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://ttraff.link/123?keyword=amber+wright+wiki In PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/xafuvebuzame.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/5290993.pdfIn PDF document text
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/1385062.pdfIn PDF document text
    • https://woxejisuwu.weebly.com/uploads/1/3/4/3/134322210/redatesojerig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f872703153a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5f8d597ee04eb.pdfIn PDF document text
    • https://favurujovonelod.weebly.com/uploads/1/3/4/4/134435517/xidokewitebelegeja.pdfIn PDF document text
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/getogexevuka_jofawijolis.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/c5a8082b3ac4c.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/vogejubolelak.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off00008f7d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off00008f7d.bin)
    • https://cdn.shopify.com/s/files/1/0266/8940/5120/files/lunamijilesaxonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8095/7083/files/dragon_ball_xenoverse_apk_obb_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9831/1323/files/symbol_for_inversely_proportional_in_physics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2615/2093/files/free_download_printable_worksheets_for_preschoolers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7149/0198/files/cochrane_database_of_systematic_reviews_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4333/2000/files/british_english_and_american_english_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/51491203891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4381/5065/files/naco_guidelines_for_hiv-post_exposure_prophylaxis.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://dejavu.sourceforge.netIn extracted file (stream_007_off0000c6e4.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_007_off0000c6e4.bin)
    • http://scripts.sil.org/OFLIn extracted file (font_01_sfnt_off00008f7d.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000c6e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC6E4 25616 bytes
SHA-256: e00282ec16f5a312e17bdc24daf30bada54f3e160e5e19972ed57cfe83b94208
font_00_sfnt_off00008553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8553 2856 bytes
SHA-256: 4d00d9a42b8c0a6281c6f91ecd2d6619cfd6d2fee89e9d65d4cff6ecb559f56b
font_01_sfnt_off00008f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7D 4964 bytes
SHA-256: bc1eb22966ac942699bf2e3d699b7d48a2a9200aa615a6ad404d340d734b8328
font_02_sfnt_off0000a054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA054 11192 bytes
SHA-256: 44abfcc196c79ea8850f6acc648b5326d0c6c44af127b777acd086a0ce4c3144