Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c30cfb2908f600d…

MALICIOUS

PDF

41.3 KB Created: 2020-09-30 03:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 954f71a5c830f2d8a9d008ec2434b702 SHA-1: b6f795dbb663aa6bf6d72bfdf50c0fd65b6f9d94 SHA-256: 3c30cfb2908f600d5f60bb3256ca2599149cde73084bc26496a90f52f208fec1
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=career+chart+after+12th+arts+pdf In PDF document text
    • http://rokedura.capitalfundadvisors.com/uploads/1/3/1/4/131407014/e5d430.pdfIn PDF document text
    • http://rukolal.landseasurveys.com/uploads/1/3/1/3/131398285/067899a999.pdfIn PDF document text
    • http://files.roundtheworld4jo.org/uploads/1/3/0/7/130740502/bakufozabugixeside.pdfIn PDF document text
    • http://gumelo.isth2019.org/uploads/1/3/1/0/131070678/zajeragekegava.pdfIn PDF document text
    • http://files.benbernous.com/uploads/1/3/2/8/132815343/bijewe.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/29457635565.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/jutifobesode.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/fa206bb0-86c8-4ab8-b5f2-5340edc15345/65399687706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b9ca842-a3ac-48cd-98a1-3f07b7333f42/10763417236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7732039c-7be8-4850-8715-ad9e9fa27d72/potijetumafifutijekisuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c91e97cc-2ea6-4580-a0e1-b5015b3e6ac6/bijuforetitarose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed6ba78-e0da-4581-888e-25652804c100/moxajodimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4523/1509/files/facebook_free_install_computer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/98163902553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6756/8291/files/wow_classic_alien_egg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6439/1845/files/don_t_look_back_in_anger_oasis.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C2 5300 bytes
SHA-256: e4d2b7f1b118908ef756514fb86eb4695db02c496731bac2c063c487fecdd778
font_01_sfnt_off000075ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75CA 10052 bytes
SHA-256: 4846443502674ea7710afa5b56da6f8d02d19f409c29a094384bc903bd086f30

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