Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ea5e50fdaa9fdf…

MALICIOUS

PDF

79.6 KB Created: 2021-03-20 07:56:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a42bb81c6044d6e02caa62ee495de7c3 SHA-1: bad7854faa0295723443c876aeb749120ba86606 SHA-256: 98ea5e50fdaa9fdf1d5b57c9a7cc61b3554d75aa2299a3c7521c1377f39adbd9
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The document body, though heavily obfuscated, contains text related to gift wrapping, likely serving as a lure. The embedded URL 'https://xajibur.ru/strik?utm_term=how+to+wrap+a+present+with+thick+ribbon' is identified as a redirector to a phishing site, which is a common tactic for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://xajibur.ru/strik?utm_term=how+to+wrap+a+present+with+thick+ribbon PDF link annotation
    • http://keniworu.mywebcommunity.org/athlean_x_inferno_max_size_download.pdfIn PDF document text
    • http://juvovagesubo.mywebcommunity.org/95757347538.pdfIn PDF document text
    • http://policyhelpcenter.com/widelubuvitusojurivedvs2vk.pdfIn PDF document text
    • http://priz24.site/42047159286cm300.pdfIn PDF document text
    • http://vitetoka.scienceontheweb.net/clasificacion_de_las_bibliotecas_escolares_y_de_aula.pdfIn PDF document text
    • http://zumasuxujole.22web.org/zimeba.pdfIn PDF document text
    • http://meetsalon.xyz/sample_incident_report_writing_examplesk0re.pdfIn PDF document text
    • http://rupazaduxil.mywebcommunity.org/act_aspire_science_practice_test.pdfIn PDF document text
    • http://interior.estate/48935053592ckc27.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/96044094087.pdfIn PDF document text
    • http://price-list.moscow/zateremizilijetepiex8ox.pdfIn PDF document text
    • http://uuuuull.space/3d_art_photo_freen34kn.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/2001_toyota_camry_workshop_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bosirizowu.rf.gd/wejob.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/vans_sk8_hi_platform_2._0_white.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/best_android_apps_for_productivity_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/jeevan_anand_policy_surrender_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/95452838446.pdfIn PDF document text
    • http://livibodake.rf.gd/engagement_letter_template_accounting_services.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/81160926633.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C3 5244 bytes
SHA-256: 638e8c2e6cd4898c66556608142d9d00da49d3107ac96ffad2806c6a6fd540a1
font_01_sfnt_off0000f79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79B 10772 bytes
SHA-256: d4877ba153c2e8e18d132023a14a7c00c89fcdb6585461a2adaeadfe9b599ca9
font_02_sfnt_off00011c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C82 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1

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