Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a2c1486909cabf…

MALICIOUS

PDF

72.9 KB Created: 2021-02-25 00:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c5e540eb0459357feea36bc1e66a3f9e SHA-1: 69893b8844cc3e7ca3b53cafee321674c76378b4 SHA-256: 72a2c1486909cabf1bd42595a1ec1be9af3e0ed6ab4cadc3871ca2e20723b172
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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/award?keyword=como+pasar+gramos+a+miligramos In PDF document text
    • https://cdn.sqhk.co/gidulikegel/bZK2Qhg/kesetegejevidupol.pdfIn PDF document text
    • https://bizavewes.weebly.com/uploads/1/3/5/3/135323934/wagarusin.pdfIn PDF document text
    • https://kelutatu.weebly.com/uploads/1/3/4/5/134521402/lufaxelomutinim-bosobatavokuw-jezexo.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/c0diejg/romance_fate_stories_and_choices_mod_apk.pdfIn PDF document text
    • https://bozaxemavokasum.weebly.com/uploads/1/3/1/3/131383719/2a8488be5a.pdfIn PDF document text
    • https://gejosubirimo.weebly.com/uploads/1/3/0/7/130776575/84032.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/AegcieC/hedgehog_rescue_rush.pdfIn PDF document text
    • https://zilisekisami.weebly.com/uploads/1/3/1/4/131437354/vegezaxupu.pdfIn PDF document text
    • https://tenubufaz.weebly.com/uploads/1/3/1/1/131164261/a37e0a23e0.pdfIn PDF document text
    • https://jamiwimavebu.weebly.com/uploads/1/3/1/4/131453695/vugujegevawagev_kexetivozaguv_korifufofofeko.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/vufeverivip.pdfIn PDF document text
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/4232334.pdfIn PDF document text
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/zasoxupemubufox.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/AX4jb2J/saporirameruvunogujeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jasixerebav.epizy.com/diphenoxylate_atropine_davis.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_off0000e084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE084 5044 bytes
SHA-256: 649b5e955a8664d6c306ef5af9a21055447c2e25e30218c169af0c60ab4afef4
font_01_sfnt_off0000f18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18B 11368 bytes
SHA-256: 9519054c10eef091d1de7b0931b830fa0ac7a7e933ef7635da493e6b50d0afcf

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