Malicious PDF — malware analysis report

Static analysis result for SHA-256 c108d9740263efaf…

MALICIOUS

PDF

77.2 KB Created: 2021-02-18 10:55:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 38e50e1005c51616c6a82846f0fbcf2f SHA-1: 5e7b1c09a2b8f36cffec437b04c9ef1649f05122 SHA-256: c108d9740263efafdfde6c4e9b8effaf4a9813ac76b4ce95fb801d5cfb147abc
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. It contains an embedded URI pointing to a suspicious domain, 'seumenha.ru', which is likely used to host a phishing page or download a secondary payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL and the ClamAV signature strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/wix?keyword=bdo+dk+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4503033/normal_60200600e5f3f.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/ihiixEY/59467734759.pdfIn PDF document text
    • https://bosewumakujo.weebly.com/uploads/1/3/6/0/136036310/3150613.pdfIn PDF document text
    • http://misovar.22web.org/bloody_stream_cello_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/tobajizil/PgjKheW/the_factory_kitchen_yelp.pdfIn PDF document text
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/101dfa05e.pdfIn PDF document text
    • https://fukoroxovelamos.weebly.com/uploads/1/3/0/7/130776486/sigasitapezilal_roxejotivevel_suwotevebom_bexixuxumatuxaj.pdfIn PDF document text
    • https://midusafamiriron.weebly.com/uploads/1/3/4/7/134702540/mefodod_daxakevim_gererafo_liwixijizada.pdfIn PDF document text
    • https://dowusasetitemej.weebly.com/uploads/1/3/4/3/134307927/0452e5ee44.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/clinical_practice_guidelines_diabetes_type_2.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/eiogiid/74559953388.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/a7877f37902e4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476593/normal_5fef7b5585d2c.pdfIn PDF document text
    • https://vejilete.weebly.com/uploads/1/3/5/3/135312445/mabefiw_tenekeroma_kutepakeje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370054/normal_5fca174c4723d.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/luropiw/jiduvip.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/nut_bolt_chart.pdfIn PDF document text
    • http://jojanotesejivi.epizy.com/sitef.pdfIn PDF document text
    • http://mosararivifu.rf.gd/all_the_way_up_spanish_remix.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/peter_handke_wunschloses_unglck.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/6818692122.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/new_movies_telugu_songs.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_off0000f351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF351 4588 bytes
SHA-256: a7615eeb17d02b02ddd01e539f99bcdeec0784b2680283ed8360bc7db14c0196
font_01_sfnt_off00010312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10312 10664 bytes
SHA-256: 2445cb022274c45c546956751d7d66250ba803e75b289c1c9a1ec9d874f61248

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