Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec7f6eba31044d3…

MALICIOUS

PDF

149.4 KB Created: 2021-01-06 21:16:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 63813b36b51aa136810600cfd01a6a14 SHA-1: a28f6dd5a67eba75033e3e9fd9293c69db4cfca3 SHA-256: cec7f6eba31044d344ace48e7743601ac69e8d7d0c822215bfec0e2176c92af5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. ML classification and ClamAV also flagged this PDF as malicious. The embedded URL is likely intended to lure the user to a malicious site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9548

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://ggtraff.ru/aws?utm_term=ayyappa+songs+tamil++masstamilan In PDF document text
    • https://cdn.sqhk.co/zokuwagopole/gFgBjhg/sisters_oregon_weather_forecast.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387825/normal_5fbc765550882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_5f9fd8456afdc.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/Lgiltji/vegan_spinach_artichoke_dip_instant_pot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f91369bc5396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f89e63d3710a.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/7af8f4b7-6ad1-4d02-9098-4bc74c114838/xadawer.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/card_recovery_key_serial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c85fe273-d85b-4e41-a659-76cf4f4d5b69/pc_racing_games_free_download_for_windows_10.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001f70c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1F70C 15400 bytes
SHA-256: 7fb3374dd99ffae5efe3edd4580c0abc9622cc783d03851047122e2d3de31df6
font_00_sfnt_off0001cf81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF81 5132 bytes
SHA-256: dae38ec4d697e4aff5ba28d57198a3e9f8728be006ae81f82039095503b970f5
font_01_sfnt_off0001e0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0F3 6908 bytes
SHA-256: 43a66b41778c3ab733771aabdf232d64f8907c28c56cfb31295bce85c69cabb7
font_03_sfnt_off000221bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x221BD 10852 bytes
SHA-256: 10028579833056141b0e9ce63c95b27518cc93097a3569ebf2913be42dc282c6

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