Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e22eb8d906202a…

MALICIOUS

PDF

70.4 KB Created: 2021-02-15 15:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9dfdb729a7515f2a9cdb1cf72e750cf0 SHA-1: 9d6d85a014cd50253d30683ddae97c9b6f50f392 SHA-256: a1e22eb8d906202a3f754e4a91c22d6d5c8f8e4811c77409b30a71c4538f64e1
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a search query, aiming to trick users into visiting the malicious link.

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://maypoin.ru/123?utm_term=what%2527s+another+word+for+over-aggressive PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496391/normal_5fe64aaddba29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475389/normal_5fdfd6660ea75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500187/normal_60217d605a81f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391013/normal_5ffeb1f0bd7d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420910/normal_6011110f7d4e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_601347442eb39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417045/normal_5fcb4d74dec11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_601413c61fa88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_6019b029e5e00.pdfIn PDF document text
    • http://kesenirevapovid.iblogger.org/netflix_for_smart_tv_android.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/dazuxujepov/9th_grade_math_test_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/penetration_testing_interview_questions_and_answers.pdfIn PDF document text
    • http://buwumipulufi.epizy.com/tonokodom.pdfIn PDF document text
    • http://mofibukuzoke.rf.gd/85791328626.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/57236727109.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/despacito_lyrics_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/avery_5164_template_illustrator.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/paxenowerisamolepojo.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/zizijiseb.pdfIn PDF document text
    • http://witosef.rf.gd/13289502809.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_off0000d519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD519 5368 bytes
SHA-256: eee3310f1fb82e7f3244b835214570d7795b3a0142bcfe6d1ecc7049fa7de883
font_01_sfnt_off0000e780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE780 10788 bytes
SHA-256: 62ee9d466e2d486fd4c8ca7222aa7d4016bedc55bf96faa6f17cf08dc0ae271e

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