Malicious PDF — malware analysis report

Static analysis result for SHA-256 409fa60b772cbb03…

MALICIOUS

PDF

68.3 KB Created: 2021-02-25 09:49:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0b366977a993a8533b430df162622524 SHA-1: ee7c365f3c1946b8725e3e173b51eb67d41228f8 SHA-256: 409fa60b772cbb03a44cf98775b6bb853be67388ce7e8512669eddc8b875e7b8
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/award?keyword=engenius+durafon+4x PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450139/normal_6021287203084.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/jgTiege/voxuzusixavudumedevezu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_5fd886aa5f583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383156/normal_6015ea18556cc.pdfIn PDF document text
    • https://cdn.sqhk.co/xafeperale/hjnjjjd/thunder_stock_cars_2.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/gbhfdj7/66437666494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497081/normal_5fe6863893607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_601ebb56bb67a.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/ihf66jf/rush_hour_racing_2_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_602a4c49e3e3f.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/tuzamada/54711864134.pdfIn PDF document text
    • http://boribasumagit.epizy.com/51474851276.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/android_studio_setup_in_ubuntu.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/2245591854.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/42315203469.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_off0000cf7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7A 5156 bytes
SHA-256: 8ebb63a2114dfdd94934550fdb4e02c13a89c2f7aae1467b5e1bcdf936171402
font_01_sfnt_off0000e126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE126 10672 bytes
SHA-256: 207a29bb31438e4c48e425bba7ef14b38a7a65a464d0e521589cde4c58e3a27c