Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab3cfa4bf419f17…

MALICIOUS

PDF

253.5 KB Created: 2021-03-14 22:36:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d4c89b635f2dc40bc101cc0fde00dc21 SHA-1: eaf87d9b55117617bfbd1e62c2b8ddbd841c8ca0 SHA-256: 3ab3cfa4bf419f171722aee3e38f6e5cbc1009c126bf5630f4f855d1c2621bb7
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded malicious URL point towards a phishing lure designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=amphibolite+rock+information In PDF document text
    • https://cdn.sqhk.co/nurijodefa/iaI6n3Q/78228962437.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412899/normal_5ff4c3efbc1b3.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/VATijee/sumozonopuxabanerolo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459631/normal_6046caad864c9.pdfIn PDF document text
    • https://cdn.sqhk.co/rumobotituda/rgi6lid/zebogakedujeselig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452588/normal_6023f088d8b30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384029/normal_6006ef7131ac0.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/72801544-d490-4a04-bed6-5f9d2b9c0549/how_to_buy_and_sell_penny_stocks_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51e04e50-9f39-4483-8195-956c6413f3d1/jovib.pdfIn PDF document text
    • http://muvalinifotu.rf.gd/linixitixiluragegapar.pdfIn PDF document text
    • http://pezomovororiz.rf.gd/mikofomuvug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15859c4d-faa0-4b6d-b458-7225aef75c37/char_broil_tru_infrared_2_burner_grill_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1b69ddc-a362-486c-9412-e8381ee2711d/how_to_connect_turtle_beach_wireless_headphones_to_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be47e2c-676a-4001-993b-18394d2705bd/22986193407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a4ad13-af47-4b4d-839e-6fb702bc0606/kevavonufilijel.pdfIn PDF document text
    • http://vusolitadiro.rf.gd/automatic_control_system_hasan_saeed_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b0a64bc-d89c-43f9-bac0-5ea6473c6f78/nebefipipetowefibiku.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_off00036f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36F2A 3180 bytes
SHA-256: 3fabb70c6d284e4588434f258bc18edcd80bd2a141e6fe7b9d2aa03778770c3a
font_01_sfnt_off00037a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37A9D 5272 bytes
SHA-256: 2dca5b2df0d95e87a60f39470151fdd50ff7d571ad60b48de433335d0429e062
font_02_sfnt_off00038c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38C5D 26440 bytes
SHA-256: d5f09807c1f479b7fa032fa718af7b92add4ad7798a283d2ac0d1c5a3e10f890
font_03_sfnt_off0003d0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D0D9 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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