Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ad849cc473ba05…

MALICIOUS

PDF

70.4 KB Created: 2020-12-25 23:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 89f333708fe9b7d4b77650252f993acc SHA-1: 863929d19582c1356a950895f9e94a32294e4d60 SHA-256: a5ad849cc473ba05a537ef04fac0057c992730e1cb20771b86dcad8556ac0c08
162 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, suggests a lure related to a 'score sheet', aligning with the SE_INVOICE_LURE heuristic. The ML classifier also strongly indicates maliciousness. The primary IOC is the malicious URL used for redirection.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/aws?utm_term=score+sheet+cricket+excel In PDF document text
    • https://cdn.sqhk.co/pupevadojas/ciajezi/1010_block_puzzle_boxes.pdfIn PDF document text
    • https://cdn.sqhk.co/simunenij/yLB8ihI/ultimate_dinosaur_simulator_hacked_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bebetirifam/jcJijig/mineral_fusion_mascara_lengthening_rock.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460983/normal_5fbac901d957e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421209/normal_5fbf3d3b9c827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411681/normal_5fa544a3163c5.pdfIn PDF document text
    • https://cdn.sqhk.co/bumadawab/qnbK5ha/73830826415.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/hQrjeJs/refibisifep.pdfIn PDF document text
    • https://cdn.sqhk.co/naxopesareg/0tgdzhd/ocado_christmas_slots_sold_out.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/goviwigax/ppt_template_microsoft.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/22522816790.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/types_of_dairy_cows_in_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/newopetusam/goxepip.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/mixalamenisibatamebapok.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/74538825880.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/jumafoxotewiwebukudugi.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_off0000d826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD826 4912 bytes
SHA-256: f9b27216dc7393e5c421574a2bd58057c0a8fab8f543d97c3125e5e202057591
font_01_sfnt_off0000e8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DA 10620 bytes
SHA-256: c79e9b8c2bada4a4e23a011fd03074dbd975a22c562a94099a44003bd27739f8

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