Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4aa593d1883cd43…

MALICIOUS

PDF

43.8 KB Created: 2020-10-28 02:54:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: 19760299d9fd5c8918a689c2ebd4794f SHA-1: 7658a4c14b59ba6e145928f316e03a04e4c79e82 SHA-256: f4aa593d1883cd43fe75eb3c4b4cdc81f8dba99e5e641170da90d9f225ea01db
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.com/123?keyword=adfree+apk+2018 In PDF document text
    • https://xapinetevum.weebly.com/uploads/1/3/4/3/134330578/razara.pdfIn PDF document text
    • https://lorudopop.weebly.com/uploads/1/3/4/3/134315835/pakuwesolidopet-luwizobixupaji-torigixuda-puromuf.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/pobuxojug-kuzadoka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/381dfabf-e43d-47e6-8b14-d748d4de6fe9/84736570735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb715415-bbaa-47ce-9c8e-1c23ee26a022/kagotupizemom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b3dd0f5-239e-48c1-9441-d360998fdd5f/zagop.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/8169104605.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/2036725438.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/breathing_meditation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473d7af8-153c-40d5-9d2e-41ef513136ce/59228585954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5b3294-4add-4cb7-a92e-436b82d1a8d2/66517232077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c70eb347-35a0-4561-a2a5-d8ec8abafb32/t_mobile_usb_modem.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/automated_guided_vehicle_seminar_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/indication_of_cesarean_section.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/magazine_in_hindi_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48691bab-36b8-4c77-baa7-d7cd48bc0de4/bilabisumobawutifomaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f971f3-7a59-446b-b6a2-bca9d8a8587f/vixen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000634f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634F 5400 bytes
SHA-256: fa030fa1b4ac0bbe62d46c70ec61cbe483f778951413bb3021dac9a35ce24d44
font_01_sfnt_off000075bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75BC 1796 bytes
SHA-256: 2392d2a4036d2cae249f7277ae14739e0990d25251d4373764733018c1ecb564
font_02_sfnt_off00007e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E48 10472 bytes
SHA-256: 474a0928d32d2bac9275b820e8e3d98ad6724856b38c6732e8aa05b4576cd82f

Open this report in the interactive analyzer, or submit your own file for analysis.