Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c17807ec9950c9…

MALICIOUS

PDF

92.2 KB Created: 2021-02-09 03:03:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2334e23a274dc00ccb3ebd8db79c67b0 SHA-1: f18a8e2b9a8bf73bb3c2cf6fdd77a5e531ae0d7c SHA-256: c6c17807ec9950c91d806765aa622ff6f48c1ca9fc82c956ebb729d0c93df284
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, one of which is a direct link to a potentially malicious PDF. The presence of a 'download button' heuristic further suggests a lure to download a payload. Although no scripts were explicitly extracted, the nature of the PDF and its embedded URLs strongly indicate it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=bteup%20syllabus%202019-%2020%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377909/normal_5fcc98e83bcd0.pdfIn PDF document text
    • http://logoped-samara.ru/1963992507038dwn.pdfIn PDF document text
    • http://online-bestshop.xyz/51219574082v86db.pdfIn PDF document text
    • http://detonicufficiale.website/zombie_diary_1_hack_apk_downloadf2zjw.pdfIn PDF document text
    • http://nout-prodat.site/derecho_storm_iowa_todayjyc1q.pdfIn PDF document text
    • http://universe1.space/ambedkar_dj_songs_kannadajdqq3.pdfIn PDF document text
    • http://penerete.66ghz.com/cyber_awareness_challenge_2019_test_answers.pdfIn PDF document text
    • http://dom-bita.org/84392996099mnc39.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/gofiguj/bonoduma.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/muvadepofojanurebi.pdfIn PDF document text
    • http://xivoganunew.rf.gd/55055034361.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/74255740375.pdfIn PDF document text
    • http://vopapokolozanum.rf.gd/pekokoze.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/xometry_sheet_metal_guide.pdfIn PDF document text
    • http://kidereludabiron.epizy.com/annihilation_comic.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001102a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102A 5360 bytes
SHA-256: 166a4646e8d33aac57f73d03b7597fb2f4e29f1468534bea5ae74bdc64148b30
font_01_sfnt_off0001227f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227F 11432 bytes
SHA-256: a3e3db6b110fd1e9a56966eceadb22853929fa21f9dc72f8ad445ca27998a6e9
font_02_sfnt_off000147ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147EC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
font_03_sfnt_off000155eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155EB 2752 bytes
SHA-256: 11bf571f0af05367446b2020c2f1c6267491649bc48117454eca19867f219dc9

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