Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96572de819b5f1a…

MALICIOUS

PDF

70.2 KB Created: 2020-12-19 08:48:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ed1466a82d85dac1e5791c172b9620f8 SHA-1: 15bd7cb131091b75a388c1aff99e23d7004caceb SHA-256: e96572de819b5f1acd13d5e3182bfd46c25f6d1b2fdd5c0c63fb51537a9d6162
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary malicious URL identified is 'https://gettraff.ru/strik?utm_term=martin+luther+letter+to+pope+leo+x', which is likely used to redirect users to a phishing or malware-hosting site. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?utm_term=martin+luther+letter+to+pope+leo+x In PDF document text
    • https://fufiwixafuwisu.weebly.com/uploads/1/3/4/7/134770326/rexog_rujiwig_tupujejudevotiv_zipetedugoj.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/5728c864-43ec-4fb7-bd3c-4530ad00e3c5/66615758562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23baec86-6a8d-483a-9517-1de317d5b6a4/industrial_motor_control_7th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c9bae6-532c-494a-b549-586bea68b6ea/56141469168.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/chrome_appearance_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e129ee5-83b5-4209-a8f7-f6ef50bcf0b8/schedule_of_classes_suny_new_paltz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34af1f87-affb-44c4-8144-ec824d63a95b/cate_grame_are_un_pachet_de_unt.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/bail_application_format_under_section_438.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/nhtsa_manual_dwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2432a2df-170c-4e36-b79a-90b3999a8fa4/74641252818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41997e97-3a2a-4e1b-ac83-a23bb5efcd56/zuwimizufulis.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD928 4804 bytes
SHA-256: ad4f877baf20cb40714e2db7f08e4692609ccc11f8fbe5b5123fcc2d0812f992
font_01_sfnt_off0000e982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE982 10204 bytes
SHA-256: 1cc27ecf9e7b1d72bf3775b16b1a0a32d6ff660f7dc90fb45fecb49fca5b31f0

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