Malicious PDF — malware analysis report

Static analysis result for SHA-256 704ba85f37712245…

MALICIOUS

PDF

73.7 KB Created: 2020-12-31 21:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d50e05448451cca2d830fe40b810e921 SHA-1: c132632799004c4e0011df1f388da7d0b06ee3f8 SHA-256: 704ba85f377122454a4d039ae04bab5d4f5de45c9756b5b9d586edde5b4737db
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. An embedded URI points to a suspicious domain, likely used to host a phishing page or download a second-stage payload. The document body contains garbled text, suggesting obfuscation or an attempt to hide the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/strik?utm_term=resmed+myair+events+per+hour+meaning PDF link annotation
    • https://cdn.sqhk.co/fejavegiwo/gcjee4o/58379376227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476927/normal_5fd3120fb78e8.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/d8jzKge/jumpstart_games_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454545/normal_5fb99b7e44676.pdfIn PDF document text
    • https://cdn.sqhk.co/kevejonob/gezijhb/free_jibjab_ecards_promo_code.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/iFichbO/54507015546.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/c7d2c40f-20a3-4e2b-a63a-33ba3b400d98/when_did_wwf_become_wwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead71df6-3c94-4726-8085-470afaa8c6b1/62054888839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94adf8b1-5751-4126-8f5d-6f2de71d620e/mavapibuwezonutokep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c68d0dc-85f6-430a-8140-4ed4a591a593/morafemedupilulofuvezedup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41041d41-eed2-43a1-b81f-e7b53f061261/divx_dolby_audio_edition_serial_numb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58448451-e9bf-4e36-abf0-6c7286b161b5/33394171010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85f6dfe-28c9-4bb5-bc89-45ef82fe6c24/zulidepoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cec667a-0907-4a8d-9dbc-1a3cb322bc6b/1617675244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f20773d-d7b7-455f-a407-8de7240c1d9d/everybody_loves_a_clown_song_wiki.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE341 5512 bytes
SHA-256: 17de176decfc429dd9ca3d95f67924c544687ce421158d4f34f2d455c3c43a0d
font_01_sfnt_off0000f5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E2 10512 bytes
SHA-256: 0369759732cd9f32f1b566820255de3a3ec1e2245f89275d48bc9bf2b27ce2ba

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