Malicious PDF — malware analysis report

Static analysis result for SHA-256 2101fafe4b87ce02…

MALICIOUS

PDF

74.8 KB Created: 2021-01-06 08:54:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 875f17148b68fcdd90ea0f71e5f9a747 SHA-1: 2cc04f2f753130489d6ba455f368543674468b9b SHA-256: 2101fafe4b87ce0233c00cc16da85d27d5fd0628ca098d6de1b039119781a632
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?utm_term=bitumen+sheet+suppliers+in+coimbatore'. This URL is likely used to redirect the user to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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
  • 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://cctraff.ru/aws?utm_term=bitumen+sheet+suppliers+in+coimbatore In PDF document text
    • https://cdn-cms.f-static.net/uploads/4473654/normal_5fafab784f507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414164/normal_5f9e069bc645c.pdfIn PDF document text
    • https://cdn.sqhk.co/kobamebexog/vXzgfii/tozusax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_5fba064870928.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500438/normal_5fc7aa9cd4ece.pdfIn PDF document text
    • https://cdn.sqhk.co/gonaxetuped/I6fjhih/nhs_discount_oak_furniture_superstore.pdfIn PDF document text
    • https://cdn.sqhk.co/tipapija/Kbijgf4/82833778488.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/gupuso/98613430357.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/indian_song_caller_tune_baby.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/slackware_current_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/jomelutijiroremijilupu.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_off0000d1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AF 5360 bytes
SHA-256: 5cf34f53404b455421fa28b863d6e60270701d16bbc4346e71a7d9adc146608c
font_01_sfnt_off0000e3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 10960 bytes
SHA-256: 069e9bd2dde2ae5a72bff2f8a3f28c922b1670b9180a9e40a0c71d9bfa8fb117
font_02_sfnt_off00010926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10926 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1

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