Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16f5aebf5596902…

MALICIOUS

PDF

99.4 KB Created: 2021-02-09 20:08:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a9bbcdec0f0eb984516bd17025339d7f SHA-1: 8c759740ed5874b46d6624384f8fc7bc76df9702 SHA-256: e16f5aebf55969022de0ccc15dbd63d49c0996b9b4d1e9207826e9e58ecb3f31
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'seumenha.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common attack pattern where documents lure users to malicious sites. The document body contains garbled text, but the presence of 'Amazon rough guide portugal' might be a lure.

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://seumenha.ru/123?utm_term=amazon+rough+guide+portugal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479433/normal_601b2b8a27345.pdfIn PDF document text
    • https://cdn.sqhk.co/jijasitov/ifiiVhc/nes._emu_android_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453747/normal_5ffe66e9f19e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489598/normal_5fc8541d458ad.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/Ba1icoW/vemugonifiwowulub.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwalimo/hcggd29/the_dark_pursuer_apk_mod_1._65.pdfIn PDF document text
    • http://penerete.66ghz.com/negegapokikijifafekevumeb.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/hgciRPp/96298539771.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421613/normal_600111b7932ea.pdfIn PDF document text
    • http://firstdoctor.xyz/87806192376dw4vu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459784/normal_6008ebc23ce69.pdfIn PDF document text
    • http://dihtyar.online/fundamentals_of_electronics_and_communication_engineeringvfn96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bubewap.rf.gd/bufiramijaronufubudev.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_off000144e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144E3 5232 bytes
SHA-256: cdf9e66d60d90d89acc113c3fcc508ea0ed7e03ebd90d2964aefe17e0b110e7c
font_01_sfnt_off00015688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15688 12856 bytes
SHA-256: b93c7df2e676c9a5ddbb6ea693607610027635d6575a9ce6f06541cf267985e7