Malicious PDF — malware analysis report

Static analysis result for SHA-256 0599b3c5881ceb90…

MALICIOUS

PDF

82.5 KB Created: 2021-03-12 10:46:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f6ca1de7a9ee4641e484f960351a6670 SHA-1: 2a79f8d8b3a6ad07b8a2c8ad02c93bf27fc06296 SHA-256: 0599b3c5881ceb904bd2bba6f7afd769f1982d1b9c9637d70ae5db3db677e238
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to redirect users to malicious sites, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The ClamAV detection and ML classifier also strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the structure and heuristics point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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/strik?utm_term=software+project+quality+management+plan+example In PDF document text
    • https://fipuzogafugigen.weebly.com/uploads/1/3/4/1/134108551/wiwegukozeta.pdfIn PDF document text
    • https://jivefumo.weebly.com/uploads/1/3/0/7/130776755/vafewagijimagi.pdfIn PDF document text
    • https://sagakoto.weebly.com/uploads/1/3/0/8/130814189/4817822.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/16447ead25d3b.pdfIn PDF document text
    • https://zugavalomiseba.weebly.com/uploads/1/3/6/0/136082075/fejotu_wogiku.pdfIn PDF document text
    • https://malugeko.weebly.com/uploads/1/3/1/6/131636988/4f7006bbe8f774.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kuxegu/can_i_travel_internationally_without_a_drivers_license.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/resident_evil_4_mod_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/kegiwelonumusalajigog.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/tumiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/570e703b-1e48-42d8-beef-bb921035b032/52682035884.pdfIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_19c2d4d83df64721a299a674c4e5f3e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobobowu/donerimogotobufojorivi.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/english_to_bengali_dictionary_app_for_android_free_download.pdfIn PDF document text
    • https://e5c8669e-8885-451c-95a5-bc65f522cb48.filesusr.com/ugd/8ff694_6f8be375f1d14f019dc34796fc86cae8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remuv/b_form_courses_in_chennai.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_bb68d4d3e35c49d78fd5adf65292d583.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wifukedot/gamalupowematigilerapini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7b0f8c1-f3fc-4a4e-925e-9dba369bfcf5/fabizopozikunenopuj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 5724 bytes
SHA-256: 8a20af1cec9f73b69c33207158d75335aef2f6090973c317d4b7f9e544e62f1d
font_01_sfnt_off0001037a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037A 10520 bytes
SHA-256: a8926958bef83365781efbd78ebec9d286d594ac0c289b462b013f092c4943d4
font_02_sfnt_off000127b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B0 16028 bytes
SHA-256: 0bae8649ba252bcfab81cb8324cfe1737d73e47191b507e117e6d0858e0066a8

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