Malicious PDF — malware analysis report

Static analysis result for SHA-256 888b71c4d5480e37…

MALICIOUS

PDF

73.6 KB Created: 2021-02-25 15:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 28b8faf679a230a4787337a5d1227408 SHA-1: 9e81141ef729bc33b2e618802115734154565019 SHA-256: 888b71c4d5480e37538062ae40439fbeb366d738c0f5251cae8c28f21bfcec81
156 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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/aws?utm_term=dmv+ny+learner%2527s+permit+test+reservation PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448733/normal_5fec2f08ee827.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/Pje9Aib/car_racing_highway_2_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461204/normal_5fcc420cbd6d2.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/jhifgiC/jopufadudirode.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/how_to_integrate_software.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369660/normal_5fc9778911917.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/resumen_del_capitulo_6_de_el_principe_de_la_niebla.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/oXQfhfo/58515947340.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rifufogasuser.rf.gd/78879409306.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/mamoxagiguwusafizotovasok.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/zuramet.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/limumikupipujojimoniw.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/34503892088.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/34604206862.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/jisolojatetudu.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_off0000e28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28B 5160 bytes
SHA-256: 25f05554813c2d86b5dcdcdac9b1c82e7dbd21d69fa8f89ef9b30bfb9b5f7c98
font_01_sfnt_off0000f41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41E 10896 bytes
SHA-256: 913b7166350eb92bceecf80adc4a43ffba32e9a02d851fc55c85e7597902a734