Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5de7734c43928a1…

MALICIOUS

PDF

74.6 KB Created: 2021-03-30 00:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 09bfeb3c28653f63cb5e851463850f50 SHA-1: 130ba08bdf0a660319f7b563d4948fcf0e11ae58 SHA-256: f5de7734c43928a10760dd55fdf8b33b34db7f504ac81ffd01559f2f9c84d07f
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains an embedded URL that directs users to a suspicious domain, likely to deliver a malicious payload or phish for information. The presence of embedded URLs and the overall detection pattern suggest a phishing or malware distribution attempt.

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://ponafet.ru/strik?utm_term=black+and+decker+hedge+trimmer+warranty PDF link annotation
    • http://ig-socialmedia.xyz/gavexavopxiepm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404293/normal_6005fb73d15ea.pdfIn PDF document text
    • http://randname.ru/757745003657j1m.pdfIn PDF document text
    • http://uscarinsurance.info/8th_grade_algebra_equations_with_answerscdy1c.pdfIn PDF document text
    • http://mamubisuk.mypressonline.com/is_killing_floor_2_split_screen_ps4.pdfIn PDF document text
    • http://on24-system.club/64035862394kh5le.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454043/normal_5fc7d7e241fb8.pdfIn PDF document text
    • http://muwazowezijowa.22web.org/hyphen_worksheets_for_grade_5.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/jemisajoda/welch_allyn_braun_thermoscan_pro_6000_ear_thermometer_probe_covers.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/554907899.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/what_is_the_best_psychology_book_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/exercise_and_diet_plan_to_lose_weight_and_tone.pdfIn PDF document text
    • http://naxesabefadufu.atwebpages.com/49841987346.pdfIn PDF document text
    • http://xakagigoneliv.myartsonline.com/42796160151.pdfIn PDF document text
    • http://tikigare.rf.gd/pezofikonudafifetoja.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_off0000e44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44B 5480 bytes
SHA-256: 6aa15d04c0da637c8fbd2d37567cee1784ccbfc8d1d45e4b47a73a1f7f6b9ed2
font_01_sfnt_off0000f6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DF 11384 bytes
SHA-256: 3b9f193846456e7ce23fa4ddfef42c9a8d930b8a1f48c37db4df3f1fc8ebf866

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