Malicious PDF — malware analysis report

Static analysis result for SHA-256 53eb433530c19527…

MALICIOUS

PDF

70.7 KB Created: 2021-02-17 22:01:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3b06dc4b7579c06bf1ce6431958801b2 SHA-1: 41eae3e4f1816e684220f3f2e0de55305af1883e SHA-256: 53eb433530c1952753b688e5e4b9f7642759829b1e8ddd8c736d874cdbe07def
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=microsoft%20visual%20c++%202015%20redistributable%20update%203%20rc PDF link annotation
    • https://cdn.sqhk.co/rifusofuwedi/hxgjOR8/70250909093.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374851/normal_5fde08b2f000b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491705/normal_6023373d610da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485702/normal_601a02ec9e4fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366022/normal_5fe5aa9c294d3.pdfIn PDF document text
    • https://cdn.sqhk.co/xurinuwame/cNICEhi/automotive_nuts_and_bolts_melbourne.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528915/normal_6013733c002d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390371/normal_6003c1e9952d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391008/normal_5fd03cff65129.pdfIn PDF document text
    • https://cdn.sqhk.co/semegopo/iczicmv/57940116236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490724/normal_6021ef2c4ae68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427267/normal_5fe93cde9bc1a.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/gihjubp/wolubiperejoboveroxo.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/abjghc4/61444605164.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/fhdieoq/gem_prospecting_in_washington_state.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://detuzojezil.rf.gd/liginewemogakutut.pdfIn PDF document text
    • http://jofesowevelen.epizy.com/voladadoropogabaposajuf.pdfIn PDF document text
    • http://zifawikixeliba.epizy.com/biluwobubut.pdfIn PDF document text
    • http://jiwajazaj.rf.gd/29532220291.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC621 4904 bytes
SHA-256: 485d9cf21b0ac1d49e0c360cadc761399b1029097e722117e05e715dc3a25a7a
font_01_sfnt_off0000d72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72A 5968 bytes
SHA-256: 1e9eca7586742dbbced463bf5f8219230220f30879151793935acd31d08a9834
font_02_sfnt_off0000eb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9D 9712 bytes
SHA-256: 5c11dadaed42b01cf0dea898d15cbb1f46dbf27816bade3837312d63e1bb1cf5