Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5b68b581dae000…

MALICIOUS

PDF

69.0 KB Created: 2021-02-23 04:55:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ca352fe014ee0bcf571cba0b8b1534a9 SHA-1: 6ec6aef436242f9d233cd400068479f80f63cc15 SHA-256: 4b5b68b581dae00097bed8b327c200e914343b1f57346d324d37f4faac923a33
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/wix?keyword=brodnax+va+homes+for+sale In PDF document text
    • http://puxegosabax.22web.org/mugozibunilevekubulet.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/gFhbsjh/comic_reader_windows_10_tablet.pdfIn PDF document text
    • https://pexigupor.weebly.com/uploads/1/3/4/9/134901766/e3c0bc697.pdfIn PDF document text
    • https://levevuwakute.weebly.com/uploads/1/3/4/9/134904524/88b431c0ead.pdfIn PDF document text
    • http://changely.club/klipsch_promedia_2.1_bluetooth_review2nv08.pdfIn PDF document text
    • http://pasasem.iblogger.org/582646629.pdfIn PDF document text
    • http://kigowamukidiba.iblogger.org/lukaxude.pdfIn PDF document text
    • http://pmaider.com/java_platform_jdk_8_32_bitgdrwa.pdfIn PDF document text
    • https://zinimokukaz.weebly.com/uploads/1/3/6/0/136053997/menosokiwi-dokuninuxufip-zewumonak-sudizasope.pdfIn PDF document text
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/7668ea70.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/xurixado/labivonibex.pdfIn PDF document text
    • http://janeresofopojaz.epizy.com/arabic_letters.pdfIn PDF document text
    • http://zazasos.rf.gd/shanghai_fosun_pharmaceutical_annual_report_2017.pdfIn PDF document text
    • http://zapuwoz.epizy.com/lodalepijavakaxofap.pdfIn PDF document text
    • http://pimisigejofal.rf.gd/apache_friends_xampp_windows.pdfIn PDF document text
    • http://kunizifafam.epizy.com/61540717022.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_off0000d1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F8 5324 bytes
SHA-256: de8211a6b91cdf35c94d7f01885aca4ac1e581d8aba59d18e968fcd2156b3e16
font_01_sfnt_off0000e3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F6 10320 bytes
SHA-256: 0880d4ab6cc08b72972e9db9ed616fd0d0f6db52b5bc13a38d795fc043e50c86