Malicious PDF — malware analysis report

Static analysis result for SHA-256 586753b03f42c148…

MALICIOUS

PDF

70.5 KB Created: 2021-03-14 23:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5c8e0b14ee43525c29c99c7f39d93e9f SHA-1: 62d2660bad19eaf382e4721fe722b7bcbff163ea SHA-256: 586753b03f42c148dafb008077fe274e65f42293b6bad72501d456e32b0e0d2a
184 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded links point to domains associated with phishing or malware distribution, suggesting the document's purpose is to lure users to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://yafferge.ru/award?keyword=canyon+burger+menu+pdf In PDF document text
    • http://xezobezidaro.22web.org/call_center_manager_job_description_for_resume.pdfIn PDF document text
    • http://bubuletigesin.iblogger.org/83990048614.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/mobetarogumijunudukezaj.pdfIn PDF document text
    • http://vijofudevadotar.mywebcommunity.org/91332271033.pdfIn PDF document text
    • http://tk-pobeda.site/74995739877d6d07.pdfIn PDF document text
    • http://nulatapukedu.scienceontheweb.net/visual_basic_6.0_tutorial_youtube.pdfIn PDF document text
    • http://kernig.store/relative_clauses_worksheet_tes5coo4.pdfIn PDF document text
    • http://zunololanuxigu.sportsontheweb.net/35506908702.pdfIn PDF document text
    • http://pixell.store/what_are_the_main_causes_of_stress_in_modern_lifetnr93.pdfIn PDF document text
    • http://zuwitirub.iblogger.org/35877123033.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nexizali.epizy.com/tezubimuk.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/44324201483.pdfIn PDF document text
    • http://vusebajawibapun.rf.gd/56718538639.pdfIn PDF document text
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_519cf68ea0b249ec84e122da51310e76.pdf?index=trueIn PDF document text
    • https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_ede623e6b2b847e381fe53efec194336.pdf?index=trueIn PDF document text
    • http://makakanow.onlinewebshop.net/79155308475.pdfIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_04640719b14d4f70a2d241a0f20be0d1.pdf?index=trueIn PDF document text
    • http://bedanodog.rf.gd/communiquer_avec_son_guide_au_quotidien.pdfIn PDF document text
    • http://poxizigifami.epizy.com/piriformis_muscle_compresses_the_sciatic_nerve.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_56d1e35d93074df2bcead67fbfdbb832.pdf?index=trueIn PDF document text
    • http://nibejodawugizex.rf.gd/how_much_does_a_tesla_cost_in_dubai.pdfIn PDF document text
    • http://puviwozizasi.rf.gd/64890354511.pdfIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_e4d2c3fdf92f400aaa628e24e4c64d9f.pdf?index=trueIn 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_off0000d7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E9 5300 bytes
SHA-256: fc2f18996326b10a71782e9d292e3071c78d8096637b70324f5b61cb37df4756
font_01_sfnt_off0000e9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E0 10152 bytes
SHA-256: 528ca62a7420aa97d9d4c6309f363378a3af951ce3bd6444aff3dcda0fca16d7