Malicious PDF — malware analysis report

Static analysis result for SHA-256 48674a7a65b7ee00…

MALICIOUS

PDF

72.1 KB Created: 2021-05-01 23:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 27c86584400fb41b1924ef2435d9e33c SHA-1: 537890a5f2dd50f7f81792f78ec5020045880972 SHA-256: 48674a7a65b7ee00e5f66c9b29776d71f6fb8d16f2fe8a4db288633c79fe2ca8
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or redirection mechanism. One prominent URL, 'https://resalured.ru/strik?utm_term=how+to+connect+dvr+receiver+directv', is directly embedded and likely serves as the primary lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/strik?utm_term=how+to+connect+dvr+receiver+directv PDF link annotation
    • http://banademebilite.sportsontheweb.net/nasogastric_tube_insertion.pdfIn PDF document text
    • https://cdn.sqhk.co/fixuzigetir/hh2s1hg/konkani_tiatr_reporter.pdfIn PDF document text
    • https://xeneniwavufew.weebly.com/uploads/1/3/2/8/132814439/muwofixiziv_wadomiwonurozuv_xifiv_tonetamuzizup.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/jigiWyK/free_pinball_game_no_download.pdfIn PDF document text
    • https://bizudabug.weebly.com/uploads/1/3/4/7/134722823/gavamujejunow-bisomexo.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/hhihOSF/38951677676.pdfIn PDF document text
    • https://denosofebulapan.weebly.com/uploads/1/3/5/3/135347567/4349608.pdfIn PDF document text
    • https://retenosarubus.weebly.com/uploads/1/3/2/6/132695405/6f77e493cf92fb8.pdfIn PDF document text
    • https://wolixakeju.weebly.com/uploads/1/3/6/0/136002716/zijelimekumirad-wudaran-kojopafu.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/bakoloj/pawirixuxasogipu.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/pinigesirumifejekasezati.pdfIn PDF document text
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_43853b6fb99246298be969fda6ad420b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/kreepy_krauly_rx3_robotic_pool_cleaner.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/anatomy_for_sculptors_free.pdfIn PDF document text
    • http://todifisafi.atwebpages.com/pulibil.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_0d7e51b575194a29babde9aa43065ad6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/xekugoxozegupikazuxiduj.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/bio_data_format_for_job.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/facebook_video_app_for_android_phone.pdfIn PDF document text
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_8ebc9102bc2d4567beb77c373014950c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/rugudefiweribapune.pdfIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_52a186b6d89f4f6a8a03962c19ccdd5c.pdf?index=trueIn 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_off0000d33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33E 4412 bytes
SHA-256: 455d8fa569c112ea0afd69378aa07a3096275f59bffa7328e150dc89dc0ee5cd
font_01_sfnt_off0000e250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE250 10136 bytes
SHA-256: bd8de571c16f690d19e0dd35591a3c8d85490bbf96a4629c4bbd24993726cbfd
font_02_sfnt_off00010510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10510 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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