Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f8aa6efc503429…

MALICIOUS

PDF

70.5 KB Created: 2021-03-14 05:28:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c6e1b9c94c91718a7e5d07e6348c78ea SHA-1: 59a6513461a4c0e3728d092f881fc3850fe65170 SHA-256: 73f8aa6efc503429a5660ab53eb7bbd54dcd994d5d3c6527e5829ee73612d85e
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a coffee machine manual, likely intended to trick users into clicking the embedded malicious link.

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://lozipotod.ru/wix?keyword=verismo+701+coffee+machine+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446166/normal_6022ee5f1bab3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491414/normal_5fde436ee91db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465914/normal_60449556e024f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527859/normal_5fda7fd794c1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_600a51cdbd206.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/jbniizI/les_centrales_hydrolectriques_du_cameroun.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/tjg3Ogc/joker_laugh_ringtone_download_mp3.pdfIn PDF document text
    • http://gosepakaf.getenjoyment.net/bjt_transistor_configurations.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458150/normal_5fd11d6338b92.pdfIn PDF document text
    • https://cdn.sqhk.co/vumojakizaw/jbEjgTA/spongebob_krusty_cook_off_level_26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_600d7a305ebc6.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://xukokumo.myartsonline.com/what_is_your_slant_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/amazon_appstore_app_store.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f39794e5-a9d7-4bf9-9cf2-03658a1f260c/medieval_hood_knitting_pattern.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c98e3df8-96fd-485a-b717-fbb937fd21ff/dipalabobirabo.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/laxesokixat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd6c0259-a99f-4d78-bd17-54c2b6e035c8/super_mario_sunshine_delfino_plaza_shines.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/adobe_photoshop_cs6_mac_free_utorrent.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/startup_business_plan_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e57c5ed-7fa9-4fd6-ba14-79850279a4da/zadapuxotopujalewep.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/bulk_sms_software_pakistan_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2676fe9b-741d-475f-a160-80089e47dd7c/what_to_feed_a_green_tree_frog.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_off0000c9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D6 5160 bytes
SHA-256: bef1e1ef769ef5f19068590ad7d2aae08f5a047f1fa0f60c3fefb9cdc03b8149
font_01_sfnt_off0000db3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3C 10272 bytes
SHA-256: dcd7b36ac8d581c7679c345a52012f30def61ef7b8c88e1a654c873bf0b45d93
font_02_sfnt_off0000fe92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE92 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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