Malicious PDF — malware analysis report

Static analysis result for SHA-256 dddc6274d98c760a…

MALICIOUS

PDF

79.2 KB Created: 2021-05-10 14:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 62ff241a9502e8c6a616a533e3257f2c SHA-1: 8130b9dccfc7a01d3bc5fabb1409008229c3b083 SHA-256: dddc6274d98c760ac9c5d0a5ed4bdbc11d9d0322582023da0c59ece2a90507ad
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to financial documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=titulo+de+credito+hipotecario+negociable+pdf PDF link annotation
    • https://cdn.sqhk.co/nugopanage/0hgijhc/64347265583.pdfIn PDF document text
    • http://kavelizopepi.mywebcommunity.org/69022321082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_606dfa6e36cd5.pdfIn PDF document text
    • https://cdn.sqhk.co/pesunexaxak/hd3hg5K/kijuda.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/eghhdsT/rasejovixafugeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474987/normal_605164a521a1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423452/normal_5ff6514c44617.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/f0ghCgd/zewodajesepinozamolu.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/ghgdidG/82559180070.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444357/normal_6007fd13c0204.pdfIn PDF document text
    • https://cdn.sqhk.co/jisokemefaz/hCjbiau/75446459605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420586/normal_603e3acf0ed1e.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CsaOhdD/77800013952.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/ehbjcgj/23980767564.pdfIn PDF document text
    • https://cdn.sqhk.co/tifatuju/k1tk6A6/88946290633.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/timeziso/97472357379.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/anointing_fall_on_me_free.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/rubibirakovipejunosulola.pdfIn PDF document text
    • http://pedamodaw.onlinewebshop.net/libros_de_brittainy_c_cherry.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/alimentos_recomendados_para_diabeticos.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_off0000f3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B4 5328 bytes
SHA-256: d92f9d6c4274f0629fd50d1b8e84a75052e8567885cf99fc7c7f90c823651b96
font_01_sfnt_off000105ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CA 12288 bytes
SHA-256: f6466693b4c977d3b2d25a0f906aec39dc2b319f7e796e4fafe215a1f0322e69

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