Malicious PDF — malware analysis report

Static analysis result for SHA-256 de31ca30a55fbaf7…

MALICIOUS

PDF

70.5 KB Created: 2021-03-08 15:30:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8fd753829ee8451c31cca639a6eadca1 SHA-1: 35fc0ed3e939b4a02af5e1a8043afeb73a7269ec SHA-256: de31ca30a55fbaf7365de43ec0cdb77592b4687afcf9509e47a4b129b64e7031
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, likely intended to trick the user into visiting a malicious site. ClamAV and ML classifiers strongly indicate malicious content, and the PDF structure itself contains suspicious elements. No scripts were extracted, but the presence of an external URI is a primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/award?keyword=runaway+bon+jovi+piano+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409411/normal_6028e2d9136d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371020/normal_5fdccbed2dbc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_5fd2da3e0144e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_602a27e59e5da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464869/normal_603cb68d8c515.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460975/normal_5ff7dd8fb0b2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410415/normal_6033c959bb5ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491686/normal_603ceea9b24ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422876/normal_6003dce1d740e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485152/normal_6010c9b01b0af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_602e1ae7dc720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462379/normal_6009ed21b5ef9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390643/normal_5fc9dd050562d.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/fizaxo/batman_hd_wallpapers_for_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/shoot_em_up_full_movie_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d2d98f-0ec1-4030-85d3-6840cb2bd7b7/clash_of_kings_website.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/kobe_beef_japan_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7baba4-ab0b-4a7b-89a1-de2754bf02f0/the_last_olympian_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/dansploit_v5._5.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/wevod.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/the_castle_kafka.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/78529216288.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_off0000d7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C0 5204 bytes
SHA-256: d499226ea3adee43684792d1172d3baacc17780a8eacfcca14a94a1f7cac832d
font_01_sfnt_off0000e9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B3 10208 bytes
SHA-256: a5b77771b330f13af297e323f5319303045f226294b5a29c04fb09e66995ba00

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