Malicious PDF — malware analysis report

Static analysis result for SHA-256 75648664896bd66c…

MALICIOUS

PDF

84.9 KB Created: 2021-05-23 19:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cdd19b2d7e6ebc8b466a37fd9c2821c2 SHA-1: 234283eedbf7898710d22c0aea876e6291e9a345 SHA-256: 75648664896bd66c8a476ad5af0890cfaacd3845f2a27f646353ead565d58178
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for a phishing trojan and an ML classifier indicating a high probability of maliciousness. It contains a large number of external links, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to 'Proyectos de arduino uno faciles', which is likely a lure to direct users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/strik?utm_term=proyectos+de+arduino+uno+faciles PDF link annotation
    • https://pajenugemin.weebly.com/uploads/1/3/4/6/134677616/8722417.pdfIn PDF document text
    • https://teraxamexad.weebly.com/uploads/1/3/1/3/131380600/65c82de.pdfIn PDF document text
    • https://dewubixire.weebly.com/uploads/1/3/1/3/131398231/c06a01.pdfIn PDF document text
    • https://kaxawoxo.weebly.com/uploads/1/3/1/0/131070710/sibulu.pdfIn PDF document text
    • https://posijakafit.weebly.com/uploads/1/3/5/3/135320461/4859304.pdfIn PDF document text
    • https://kekorozonositen.weebly.com/uploads/1/3/2/7/132710750/896756e0e62b0d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415331/normal_5fe17666439bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408177/normal_6008dc350828c.pdfIn PDF document text
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/2e683d.pdfIn PDF document text
    • https://zedabobosarafon.weebly.com/uploads/1/3/0/8/130813357/c77420aa45223.pdfIn PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/3991243.pdfIn PDF document text
    • https://voxuvuru.weebly.com/uploads/1/3/5/3/135390020/6734102.pdfIn PDF document text
    • https://kukonite.weebly.com/uploads/1/3/4/6/134611202/b24039053fe8e55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac48fa8-0292-402a-904b-b4c67ee56ec6/xasizekipafoweropi.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/mefujegadexumagup.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/how_to_measure_the_magnetic_flux_density.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/846fcc16-ee79-4060-8a98-c57db108af45/how_to_reset_ipod_touch_2nd_generation_without_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df809ddc-df9d-4aa9-a95f-2bb9d9fee3da/nijosuxiniro.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/molavex.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/22180795191.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/sources_of_chinese_tradition_vol._1_2nd_edition_ebook.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BE 5120 bytes
SHA-256: e5c04951eb30077a28db42dba1a4f774db99f63a845039080241e6a77807a34b
font_01_sfnt_off0000fb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB39 2504 bytes
SHA-256: 123b1ab14fb65fa98a494cb875f9718bd41ec25ef62475bfa64e60647bdfa566
font_02_sfnt_off00010620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10620 12192 bytes
SHA-256: cd6adf8aeef67b6a136d77fd241981df41841277495bf18ae2ae517a1abed532
font_03_sfnt_off00012e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3F 16344 bytes
SHA-256: f3b95f1269985bafc3dfb9b5b35e76df8a4d57039a143c013aed99c7cf3a4a89

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