Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3fc84442b50642d…

MALICIOUS

PDF

101.9 KB Created: 2021-03-03 01:10:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5c5b7e92788be644415bd02926b31235 SHA-1: 2639344fce94a0dbf1374a9779a5750e5d3b74e0 SHA-256: b3fc84442b50642dc6d225fb92c878386f336f74d61ae874f465c2594bea5623
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or redirection mechanism. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a phishing or malware distribution attempt, likely leveraging embedded JavaScript for execution.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=what+order+do+you+watch+divergent PDF link annotation
    • https://cdn.sqhk.co/mujowofapubi/0L1QMjb/transparent_phone_screen_hdmi.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/ic52jfx/mastercraft_2020_new_crafting_e_building.pdfIn PDF document text
    • https://cdn.sqhk.co/madosodu/jcOjaij/gexoweduxog.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/iiRqb4d/word_games_online_free_shockwave.pdfIn PDF document text
    • https://resawipodejevi.weebly.com/uploads/1/3/0/8/130814711/0426f96458463d6.pdfIn PDF document text
    • https://sopetenoredu.weebly.com/uploads/1/3/5/3/135318191/lolisoweropup.pdfIn PDF document text
    • https://cdn.sqhk.co/kelifevaz/ekiiqig/dasavib.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/Albjiic/prism_live_studio_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/igVjhid/gmx_cloud_windows_10_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/kLoiiwC/ombre_nails_coffin_shape.pdfIn PDF document text
    • https://gezajinesobovu.weebly.com/uploads/1/3/2/3/132303035/vopaxiso-dulezolokuzopas-bamoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481272/normal_6013a3a227c41.pdfIn PDF document text
    • https://cdn.sqhk.co/nusatabi/O3Sijhg/81303101388.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/eZBhhZj/core_x_system_of_elastic_tubing.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/DShaahe/wedikiginosujiju.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
    • https://s3.amazonaws.com/kelageketisefuv/pomexevenutedizab.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/golden_sun_lost_age_djinn_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/dopagizukiruxinozen.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/core_java_syllabus_durgasoft.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/gotcha_covered_sheets_review.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000144b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144B5 5140 bytes
SHA-256: 4b78e76027be0903e0cbddd5d1c578f51b48186ee68ebb62b642767fbffb36e6
font_01_sfnt_off00015647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15647 10940 bytes
SHA-256: 6dd57f114da4306081381717fbe89091ecb023b35f9732c7752d999b673b1f0d
font_02_sfnt_off00017bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BCB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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