Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8620cb5f42e24f…

MALICIOUS

PDF

73.3 KB Created: 2021-04-05 08:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1275c2d82e63a710d36bb3d04159223c SHA-1: 789452c78a017eb2c1daedf44d44cc3ca4d8bdba SHA-256: 4e8620cb5f42e24f36c46b9ede0cd46749fdd2b3bf5f4abda33f069445c61ca5
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and numerous other URLs were extracted, many of which are associated with malicious or unknown reputations. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a potentially harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wix?keyword=happy+birthday+ringtone+zedge
    • https://static.s123-cdn-static.com/uploads/4370778/normal_5ffb12c7d287f.pdf
    • http://makedctl.site/43289066554e09ck.pdf
    • https://livadekawa.weebly.com/uploads/1/3/5/3/135317457/kilibox-datufomu-dafekolamox-kedurite.pdf
    • http://tersq.fun/piselazozukefomizaralufiwef8xi.pdf
    • http://rentline.pro/pilipilisukagogagufutoroh7l.pdf
    • https://cdn-cms.f-static.net/uploads/4428039/normal_605d9e23e18a3.pdf
    • https://cdn-cms.f-static.net/uploads/4407747/normal_600a8953dda15.pdf
    • https://cdn-cms.f-static.net/uploads/4499653/normal_605f3e0c9a977.pdf
    • http://nafigunagofadab.getenjoyment.net/binomial_expansion_notes.pdf
    • https://nomukumimakolu.weebly.com/uploads/1/3/4/6/134649360/d3402ae222204b.pdf
    • http://saudiautoinsurance.com/radorodixapugimqjyeg.pdf
    • http://worldhold.online/764352021027mrm9.pdf
    • http://kimokabif.medianewsonline.com/english_speaking_books_in_marathi_free_download.pdf
    • https://fuzedefona.weebly.com/uploads/1/3/4/5/134578490/bonotup.pdf
    • https://cdn-cms.f-static.net/uploads/4368996/normal_60484a7a0da36.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/102c2a24-cc15-493c-9120-05ff97827cda/wasababulevalopo.pdf
    • http://wetukanezin.atwebpages.com/buchi_emecheta_second_class_citizen.pdf
    • http://jupevesu.atwebpages.com/63535883356.pdf
    • http://pugazapuxijal.myartsonline.com/merriam_webster_learner_s_dictionary.pdf
    • https://uploads.strikinglycdn.com/files/0a151b83-96b2-4f53-bd95-b9a9383ff6d8/23511221801.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfe8.bin
2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE8 6440 bytes
font_01_sfnt_off0000dfdd.bin
474f3047ad5634e6874a1676976f0a7a363c3bc26736a37fc7c6e2fa2d0d5d71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDD 5264 bytes
font_02_sfnt_off0000f1c1.bin
2df65511401b49571933fe8e3fd21adba5bb163ebef11298bfd4fc34e5018c4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C1 11292 bytes

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