Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd48c77e754a155…

MALICIOUS

PDF

91.1 KB Created: 2021-05-25 00:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d3f9b9956a60e53b198295fdbc894810 SHA-1: cc1dc4df73a5756c7167b994420ff436c16a0137 SHA-256: 2bd48c77e754a155fb5624edd8e4607095d9a75d55b5d07c8b42d64805e8ec41
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/strik?utm_term=what+are+negative+character+traits In PDF document text
    • https://cdn-cms.f-static.net/uploads/4479224/normal_603c5961f0f7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_600f124f9e204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485010/normal_5ffa5a0f9b714.pdfIn PDF document text
    • https://fodonisegijiwos.weebly.com/uploads/1/3/1/4/131437376/3b028dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495413/normal_5fd3c997687d0.pdfIn PDF document text
    • https://jazujopu.weebly.com/uploads/1/3/0/8/130873842/fozodiburabiru.pdfIn PDF document text
    • https://migobagola.weebly.com/uploads/1/3/4/8/134874333/wosiriwogerim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_6063a7133c4bb.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/d26d421a-03c9-4e42-afb7-26dd5718fb36/dajodudovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4ee88a1-e248-444e-8907-a865afbf1209/what_happens_if_i_get_a_fake_check.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/how_long_do_you_cook_a_boneless_turkey_breast_in_an_air_fryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bdd8b29-9620-4135-830c-e42a0dbc78bf/fafibobivira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd91d19-c7b5-47fa-9524-c676188ee06e/xuxiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f576422-d579-4b41-a7b7-9f74a61908d5/tamofonikuxumedixovanegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0342115e-726a-4b54-a311-1ac08ee319d9/xokelaroduz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071739f3-3686-42c5-a7a5-3656c874f89a/sopata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3dd8b74-a440-4fce-a62c-bf657bb1133a/silimidupepepagegugoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f97b5e5-c44a-481e-bd69-fa9a8e0e72c6/cisco_ccnp_security_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a037713c-e070-4ce2-bbff-7260d5a96f21/skull_game_arcade_games_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dc7ee8b-ffed-41a7-9f91-b3dd215d2260/bounty_hunter_code_vault_edition_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/what_did_the_elephant_man_die_of.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d187d37-ab35-4833-b10d-cd207daa8131/22318120620.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001133c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133C 5100 bytes
SHA-256: 2e827e8cd0415dffe77c7fd2d0f06022df20cdd9923041fef00579b11c0a9d51
font_01_sfnt_off000124a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A8 10812 bytes
SHA-256: 92c3f807223841dca2a084f83de5c4ac6360e700b27223d7e4c1737758b6f0f8
font_02_sfnt_off0001498e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1498E 16060 bytes
SHA-256: fe9f335d0611d827ce88dc1c7cba7fb9f264c7c87fb33045be4a8b4ace16f02f