Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca703321453f8765…

MALICIOUS

PDF

57.0 KB Created: 2020-10-19 11:39:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1bb65efb77dda1580d213c5823bcf3b2 SHA-1: 94f0ac308287792d905004a7e45e64e3137b3a36 SHA-256: ca703321453f876550b1f188222f4570c651027241859520b0c9ce862cf80665
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://gettraff.ru/123?keyword=clean+master+vip+unlocked+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_5f8cf68e35960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369511/normal_5f8950e60cf4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f8d339e05448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f8749f63552a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f875cf476b41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_5f89bb8127159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f87565b4d60c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f8805e11e7e2.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/35282d50-64f7-4a10-8325-7f28cba106d6/gabapumanutamelitegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a1edb18-5ac4-4b39-8e9b-ed2d5064eccf/autonoma_vs_vergenza_y_duda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c89782cc-08da-42cb-a100-42a10559fa04/fl4k_crit_build_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bac0351-7435-4b3b-9b38-22c0bf206f70/vilalipozesode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69cfe3c9-1e29-4fd6-a67a-6b4b15671cda/wurudomoxufomoleto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff0b065b-b5a0-4e71-a790-ef1af6704985/7600631123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2576f9a-b3f2-4274-bd99-c469fb056c81/60826364149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70508f26-52e4-4f13-8725-2c21e6c4bb04/jufonifatamemij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11571771-4e56-453b-849f-ae528763ad3f/36850852381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75130666-b68c-4830-8094-9affccef2c36/19904353475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05aa8f89-fa09-49e1-93b7-5691109b24ea/42153862753.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E5 2952 bytes
SHA-256: 013fc9f45313cdddd5762e6694753e55f6a85ad2eec225b6e17fd140af1ee5c7
font_01_sfnt_off00008c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C74 5248 bytes
SHA-256: 8f22c1183482c9b6a2bd38a4dc57a7daf5e785c3eecd40f8f17404f98e704715
font_02_sfnt_off00009e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E36 10232 bytes
SHA-256: a6916f81a2594dbd4d592f9a49e63d2d70deffe17347deb097a713908f5ac71f
font_03_sfnt_off0000c164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC164 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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