Malicious PDF — malware analysis report

Static analysis result for SHA-256 11780563c18f7561…

MALICIOUS

PDF

77.6 KB Created: 2021-02-25 05:51:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 66399f15ff97cc010ce311f03f95b7b4 SHA-1: dea90c792c7dee98a8145f34b8c9e642b0b455ad SHA-256: 11780563c18f7561a82ec2cb25a4bf1480afa9eec36227712ce84ceb12c7eb6b
136 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-severity rule for an image lure linking to an SEO redirector, and a critical ClamAV detection. The embedded URL, 'https://leonvi.ru/strik?utm_term=roadmaster+mountain+bike+26+inch+walmart', is likely part of a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness.

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://leonvi.ru/strik?utm_term=roadmaster+mountain+bike+26+inch+walmart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367645/normal_6022b6b75d21f.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/fjjgiTh/ninja_foodi_blender_recipes_ice_cream.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460263/normal_5fe0ff53d105c.pdfIn PDF document text
    • http://mon-cmb.best/62805228573gkqj5.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/tabla_periodica_nacionalidad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_60180a242216a.pdfIn PDF document text
    • http://my-favshopg.online/momuzeworunuvevoria6o.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/tixajutedogazevupuzenen.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/70341032830.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/disney_fake_book_2nd_edition.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/how_to_set_daylight_savings_time_on_casio_tough_solar.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/10387878880.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kavibajegis.onlinewebshop.net/3316631809.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/lab_report_deflection_of_cantilever_beam.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/free_printable_peacock_wedding_invitation_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/97314673724.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/hd_wallpapers_for_laptop_1600x900_free.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_off0000f22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22A 5768 bytes
SHA-256: 338bd17915e7c2050bfc0946ba2b6ff7efa08b6443011f89651b731857650e1b
font_01_sfnt_off000105c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C5 10400 bytes
SHA-256: 5690b67afc259daee73c7e5050c5e56a5986d16451e0c1d54f9c982c6d40f70f