Malicious PDF — malware analysis report

Static analysis result for SHA-256 e564b3d536921e53…

MALICIOUS

PDF

68.9 KB Created: 2021-02-21 00:20:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1a31a059654151a8a41074c5eb1447f4 SHA-1: 4979abf62b1222e94adcf0cdc2d11f83cd50db38 SHA-256: e564b3d536921e537663b3fba5d3a693f7a6814856f28833a6102bdaa01beb7e
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://crophysi.ru/wix?keyword=sierra+7+hacked+mobile In PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/WiiH6rp/tripp_trapp_baby_cushion_install.pdfIn PDF document text
    • https://naligunuded.weebly.com/uploads/1/3/4/4/134472871/eff96e13e.pdfIn PDF document text
    • http://jasavutarapif.22web.org/dna_replication_enzymes_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/hhrYKj3/transfer_paper_for_wood_michaels.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/hehcUOy/solar_system_drawing_very_easy.pdfIn PDF document text
    • https://dudegakabiwuzab.weebly.com/uploads/1/3/1/4/131406663/jolove.pdfIn PDF document text
    • http://sefesipodaj.22web.org/chocolate_girl_song_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/1L7wIaW/dabejet.pdfIn PDF document text
    • https://sigesibum.weebly.com/uploads/1/3/1/4/131438142/bopogusuvutaz-poroxusevexufa.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/hhdiahd/safari_callaway_gardens.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/bezegoluzose/satupil.pdfIn PDF document text
    • http://datojotimesa.epizy.com/zosumajol.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/refenosamubixezusujewelet.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/formation_agronomie_montreal.pdfIn PDF document text
    • http://jiwerefupuz.epizy.com/fagirumudo.pdfIn PDF document text
    • http://lolowavedipugis.rf.gd/nenojoxewumivazokuvalotes.pdfIn PDF document text
    • http://levewome.epizy.com/refugetata.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_off0000d1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EE 5388 bytes
SHA-256: 3c912ed7799e7369d6ed1ab184fc0619d084b7af51edac8d445e53cedda46a33
font_01_sfnt_off0000e41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41A 10240 bytes
SHA-256: 7489364c200d1d4b4f47ec674e87786c5bd95698558516b60cb9f48a35820008

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