Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f4b092f2fb5253b…

MALICIOUS

PDF

74.1 KB Created: 2021-02-25 05:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a722b02006ad2f46909a770116fa5818 SHA-1: db1d5c120609fa82c43400abb5e5de58cff9fb3e SHA-256: 4f4b092f2fb5253b48a389e12590c6ed2c59b16f1762b084508c5114e5d3b43a
136 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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/123?utm_term=how+to+make+bootable+usb+for+asus+eee+pc PDF link annotation
    • https://cdn.sqhk.co/lirerafi/ijMibRx/37145627775.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/agj7wha/xopemusizirenuridovuwaxof.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/vishnu_sahasranamam_names_list_in_kannada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386607/normal_5fdc01720da69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383915/normal_5fedbd1c2dd72.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/hdDijp2/19356738961.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465128/normal_5fc6bbc1b5096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460230/normal_5fdc8c657affd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_60359ae27d5bf.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/13974116370.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/jidagafinuxesu/choose_v2_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/92016850376.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/noxituko.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/zemumana.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/chiari_malformation_type_1_treatment_options.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_off0000e2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BB 5416 bytes
SHA-256: 79bcecfc46247d0ff3039d4e791497f590ce598a4c167964cff4b2dbcc6954ef
font_01_sfnt_off0000f51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51F 11256 bytes
SHA-256: 48adcf832cfc3573381b65913b27010f5599068dbc000fd4ae431058a2ea4d0f