Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2aaef47cd47a7b…

MALICIOUS

PDF

71.8 KB Created: 2021-03-11 22:59:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 116841a285a8d068d5f45a4c35eba2b4 SHA-1: de8c705ede0bcaff1b18fb0bd4d72e5ce7fc4694 SHA-256: 4e2aaef47cd47a7b0a298b9447238277b48c9fb5d1c35b13fbdd84a6fb9d6330
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a high-severity heuristic firing indicating it's a phishing lure using an SEO redirector. The embedded URL, https://jottigo.ru/award?keyword=adjectives+with+prepositions+list+pdf, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest it's designed to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

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/award?keyword=adjectives+with+prepositions+list+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402710/normal_5ff662c21fab6.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/hjfifhb/99268047922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496853/normal_6026c2766697a.pdfIn PDF document text
    • https://cdn.sqhk.co/lulaxujik/AngdjeO/fedoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389108/normal_603a2b11dedf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497358/normal_5feef85d7cf91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370309/normal_5fc90758a8d9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384304/normal_600ac9bc67f5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487894/normal_5ff03f909eb25.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/42c5012d-b82b-4872-a20d-c53c0c0cc4ae/what_should_i_put_in_my_time_capsule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d3f25f8-987f-4b76-a12e-832b30de5f8e/xebolizomatajamafa.pdfIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_f49332ac046245bda7eb71719352683f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15c8ada-96a7-41e6-962a-64b6dabe90ec/what_is_papa_johns_crust_made_of.pdfIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_32e1656965d4488fbd12bdb3cf30c5ec.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3088614-2cf5-4ab8-b98a-46a2c67ce5e7/wurozogakenivageduxax.pdfIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_8c74930f449042b2994600ff6f53db17.pdf?index=trueIn 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_off0000dd20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD20 5248 bytes
SHA-256: c3167bbc2872da79a803a40b44fc18068a229099a367dfd644333a754e33ab1b
font_01_sfnt_off0000ef19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF19 10260 bytes
SHA-256: 52b43488a8cd3ad1b33edfbd8d7a4e6c836035b282493f4b65b0d9e8d70b9262

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