Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2a8a02d4c662b7…

MALICIOUS

PDF

88.6 KB Created: 2021-04-19 05:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 10bf59ffca61cd52954f80d29eda3d67 SHA-1: dc712bcace40b98990bb11e20c6e8765269e5c3e SHA-256: 9d2a8a02d4c662b77693f2c8a7d048da99e3ac89687b002ec339d00caca570d0
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including external URI links and a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF, likely used for phishing or to download further payloads. The embedded URL points to a suspicious domain, which is a primary indicator of the attack's nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=how+to+calculate+interval+time PDF link annotation
    • https://cdn.sqhk.co/susononuz/jbT1Pja/tevujuvebokugojodo.pdfIn PDF document text
    • http://copyrightnotice-ig.com/tabla_de_multiplicar_hasta_el_20bnqor.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/sibatezokipubatewonokiwwin38.pdfIn PDF document text
    • http://basvuruizleme.online/dorakzxj4v.pdfIn PDF document text
    • http://lexamopelezun.mywebcommunity.org/zunizek.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/6KFDji2/marketplace_danbury_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/jomutepe/chh7hdu/17148510664.pdfIn PDF document text
    • http://wupemokabate.scienceontheweb.net/taworugupevikurifabo.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CBzRJjj/4831920716.pdfIn PDF document text
    • http://getcreditreport.info/according_to_matthew_full_movie_300mbeyt8x.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/gawawipobalulo.pdfIn PDF document text
    • https://cdn.sqhk.co/rofejusoturi/ltVolz3/xujawixegadotixin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_42eae70d29c244d09afead64139938d7.pdf?index=trueIn PDF document text
    • http://xifimerin.onlinewebshop.net/malayalam_bible_study_notes.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_247b6d1426bf4bc3b09d2c52b039dba2.pdf?index=trueIn PDF document text
    • http://wusuposakatoxel.myartsonline.com/17118488790.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/31612315943.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/hp_7612_printer_price_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/temipumumi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013bc2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13BC2 17080 bytes
SHA-256: 62952eeb47579e224f94f980badef1e4407ba02a84d6af327da6737b643abea6
font_00_sfnt_off0000f458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF458 3764 bytes
SHA-256: ec1d33764d1f4d424127d8dd9078dfa96b67b6f69c572bb066a6cb73dd2d8349
font_01_sfnt_off00010199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10199 4880 bytes
SHA-256: 6aa711195a3ec377aeb199db090de27e873c8a709a7c536a1417acc8def146de
font_02_sfnt_off00011230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11230 12944 bytes
SHA-256: 342ad6f8184711be8e8731d3c89dc08f1041aa0a58228410d4ce5f209c3ac034

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