Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f4f8ff25471ecc…

MALICIOUS

PDF

76.2 KB Created: 2020-12-24 13:51:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 088b60dc2c3373043af420db978f3797 SHA-1: 729a0aaa41bb7ee53ad0b1ebc2306a67592eea8c SHA-256: c2f4f8ff25471ecc7170aacfe9ff9412552732fd902bcef3ee1603ad55208ccb
96 Risk Score

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. The embedded URL, https://traffnew.ru/aws?utm_term=android+cannot+connect+to+free+wifi, is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a theme related to connectivity issues, which is a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/aws?utm_term=android+cannot+connect+to+free+wifi PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/cloud_application_architectures.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/leisure_time_activities_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/captopril_25_mg_bula.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/nopusipolimonogekav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e94cab92-31e0-4ecf-bcd3-3f4d49c71a20/my_guy_syndrome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58bc0baa-c95d-421c-a9fd-44707a5978fa/17686488312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/980242b4-f406-4484-8d37-d58abf529863/bafazeg.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/7411569345.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/sumuzefidimiruf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e383c07-0752-4be7-89e9-16fd8ccbb659/day_and_night_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4f0dd23-c788-42ac-9071-cc61452ef4b1/tssaa_football_scores_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/maine_lobster_license_test_answer_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/gagerurogubemorokobuto.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/free_printable_halloween_birthday_party_invitations_templates.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_off0000d990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD990 4888 bytes
SHA-256: 7db57bef819793e4e3d06d9e29fb3885e12c10af7b235f47fd6b0de2ae20b594
font_01_sfnt_off0000ea54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA54 10760 bytes
SHA-256: abeb788f35216a796e0b0eeb61d4acdd0724948635d242fda7a4e52cb4bb0367
font_02_sfnt_off00010f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F32 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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