Malicious PDF — malware analysis report

Static analysis result for SHA-256 547330dbae729df2…

MALICIOUS

PDF

73.9 KB Created: 2021-03-01 02:34:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 514ea6d8a5f73df7825db8140348bf12 SHA-1: f9d66d83c74ec4b2c17da3b13d7e7691ce02727b SHA-256: 547330dbae729df2c0c092112a74e2c5ad444fac8dbdffdbb698f1598160ed00
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many hosted on disposable domains or link farms, suggesting an attempt to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a phishing or spam campaign context.

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 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/123?utm_term=first+data+fd130+duo+thermal+paper+rolls PDF link annotation
    • https://gobunelesivuwol.weebly.com/uploads/1/3/2/3/132303092/mogibizisoxesawi.pdfIn PDF document text
    • https://safusugefivelu.weebly.com/uploads/1/3/4/3/134346528/9140165.pdfIn PDF document text
    • http://kavelizopepi.mywebcommunity.org/xinafadavokiji.pdfIn PDF document text
    • https://cdn.sqhk.co/zebasama/jbhiibi/revuwanamuwone.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/hhijwr1/tazolasufelef.pdfIn PDF document text
    • https://ziduxaxeg.weebly.com/uploads/1/3/1/3/131380546/nadarajod_woxewawu_lozipevuf_bedoxazafija.pdfIn PDF document text
    • http://batezelokev.iblogger.org/bumate.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/how_to_reset_waste_ink_pad_counter_epson_l380.pdfIn PDF document text
    • https://xunuvetokogira.weebly.com/uploads/1/3/1/3/131384336/1261623.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/Xgh1Mah/face_masks_for_sale_made_in_usa_amazon.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://buvodadixasiz.epizy.com/powagizanawizoluj.pdfIn PDF document text
    • http://bexukavibume.myartsonline.com/artemis_fowl_book_1_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/chinese_dragon_face_mask_template.pdfIn PDF document text
    • http://samanoniminowut.epizy.com/formasi_cpns_halmahera_barat_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/the_sea_of_monsters_prophecy.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/maya_angelou_books_in_order.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_off0000d246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD246 5372 bytes
SHA-256: b1051080378ab64012743b942379b5932bd0e5294b77ef91ce2a33736b3754a9
font_01_sfnt_off0000e48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48D 11188 bytes
SHA-256: 9f54c8bfc0cb209156ceef95b33cd5c154e0d40bd983b4a30b17ce84a3031987
font_02_sfnt_off00010a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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