Malicious PDF — malware analysis report

Static analysis result for SHA-256 314d7967e3d6d6d5…

MALICIOUS

PDF

81.3 KB Created: 2021-04-19 16:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f107433d4ea96f5e4e1514010cc30aee SHA-1: e65fb6f6048a2398447d0c5429084123c03a734e SHA-256: 314d7967e3d6d6d5c0d62e07bf9a95758b069317fe9701eb453491b2bfe4f43d
136 Risk Score

Malware Insights

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

The PDF contains multiple suspicious links, with one specifically flagged as an invisible lure to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://kuzutuzo.ru/strik?utm_term=black+and+decker+electric+weed+eater+string
    • http://kalanuso.iblogger.org/altruism_psychology.pdf
    • http://com-login8.xyz/34721912844xogw0.pdf
    • http://gewebufokorilu.iblogger.org/91241206862.pdf
    • http://raifaisentapp.online/gevogokexefufuzitilimigar6c3ys.pdf
    • http://wonder-ita.fun/561390782398wz5h.pdf
    • http://mirror-x.org/why_america_isnt_the_greatest_country_anymore_speech4qdxf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://sexupoweduf.epizy.com/71380119102.pdf
    • http://xomemajerezazaz.rf.gd/how_to_reset_my_lg_ice_maker.pdf
    • https://s3.amazonaws.com/zoxewudunigus/26989557804.pdf
    • https://s3.amazonaws.com/lixisariwulo/zajejera.pdf
    • https://s3.amazonaws.com/tidigudetefumof/can_we_work_two_jobs_in_india.pdf
    • https://s3.amazonaws.com/kobivimelelo/excel_2016_shortcuts_keys.pdf
    • http://gekokapemux.epizy.com/75687714123.pdf
    • http://dusegakalo.epizy.com/acronis_backup_server.pdf
    • https://s3.amazonaws.com/radubozufiwo/quotation_template_graphic_design.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f28a.bin
9aa65c074de5c985534e896494dc88446271ca5d9b7cf014fc7c34957821898e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF28A 4992 bytes
font_01_sfnt_off00010394.bin
e812de1942c5edb3b587077a360b4c513fc0f47f0ac65cdac5d157249f5d0322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10394 11156 bytes
font_02_sfnt_off0001296f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1296F 4324 bytes

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