Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10fc2ab4ac34f38…

MALICIOUS

PDF

79.6 KB Created: 2021-02-24 17:23:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 468233e466cfa13839f35d147c543493 SHA-1: 6728ac5a133d017959e8cac938ce7bca9bd9e70b SHA-256: d10fc2ab4ac34f3836ceef5dfa1a70b88f7d1b20c7b305c23653fa39b5967178
196 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
  • 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.
  • 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/123?utm_term=ar+15+scopes+4x PDF link annotation
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/nawak.pdfIn PDF document text
    • https://latolupolazu.weebly.com/uploads/1/3/4/0/134017494/1595138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487201/normal_5fd31bfd62c48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444877/normal_5fd7b22fe48cb.pdfIn PDF document text
    • https://walazufa.weebly.com/uploads/1/3/1/3/131383665/8276863.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476590/normal_6003dcfc59f63.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vozajaw.rf.gd/article_370_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/what_are_the_types_of_alienation.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/51154046540.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/letra_de_stressed_out_ingles_y_espaol.pdfIn PDF document text
    • http://baxuset.rf.gd/lenguaje_corporal_en_ingls_espaol.pdfIn PDF document text
    • http://bolizubixekop.rf.gd/lame_enc._dll_audacity_2._0._6_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/42440178419.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/25998738876.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/kafigufuvit.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_off0000fc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC06 5008 bytes
SHA-256: a1de5f473d623be86e7b1ba5a8318f8b1af48fa9e1a7aa7ca85223fb24c7a609
font_01_sfnt_off00010d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D39 11084 bytes
SHA-256: 5b6b1499a24487f330980c3238907d415b94d3e34266271eda3113e8819d2dc2