Malicious PDF — malware analysis report

Static analysis result for SHA-256 c481ac45a977acaf…

MALICIOUS

PDF

75.0 KB Created: 2020-11-10 06:56:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 77f609767248de5bcff2d3043695d9b8 SHA-1: 5869a711d2b92b41a5508039c0043bd9c8f15991 SHA-256: c481ac45a977acaf0bccb07113b38a82ac03200ac1b0b70d42f7fa390a568b1c
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/aws?keyword=playmobil+knights+6006 In PDF document text
    • https://bijimeko.weebly.com/uploads/1/3/4/3/134327756/841711.pdfIn PDF document text
    • https://zuvopejibi.weebly.com/uploads/1/3/4/0/134017525/8036346.pdfIn PDF document text
    • https://mubuwejazanewa.weebly.com/uploads/1/3/4/5/134585617/943402.pdfIn PDF document text
    • https://matasomorat.weebly.com/uploads/1/3/4/4/134492922/luxewavuso.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/mobaso.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/7393002.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bidivo/salwar_kameez_ladies.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/basic_electrical_engineering_notes_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3f100e3-e757-41bc-9379-cf5c3e66ce32/dell_inspiron_mini_10_pp19s_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acfc96de-47f3-4027-9012-4e52bab34d4b/8879492553.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/kinetic_energy_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/monster_hunter_world_decorations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c2452e-8322-43b2-8e43-49fa27fbdb49/kinematics_formulas_acceleration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f88cdfc-36de-4a24-a86d-71cc31337516/worelixoluketi.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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f522.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF522 23264 bytes
SHA-256: 4eea2e81129ae84af54a3ff116bfa2e01fdd9aba0cfc8acf1ed256aa811e7ada
font_00_sfnt_off0000bd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD3E 5604 bytes
SHA-256: 00582c74de0b1365c91a07839f5d42706ef773d871a56fe10a145cc7af66b6d2
font_01_sfnt_off0000d03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03E 11028 bytes
SHA-256: fc58cb4ca8b74a626e1d81fb519b78ec2567690cb94b7d6b8701a6f3ff778d45

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