Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc06aa4b7de343c…

MALICIOUS

PDF

74.0 KB Created: 2021-02-16 04:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c189c31a4f82952896a7bdf84fffd833 SHA-1: c74a64bc980fb134f38ef1469a5a5de1f8cd71e5 SHA-256: 6cc06aa4b7de343cc95dc7ac82d4a39cc56ea57e83ed3ec3ffbbf0b6eea11643
96 Risk Score

Malware Insights

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

The PDF file, disguised as instructions for making origami, contains an embedded URL that likely leads to a malicious payload. ClamAV and ML classifiers strongly indicate maliciousness, and the presence of external URIs suggests an attempt to redirect the user to a compromised or malicious site. The document body itself is heavily obfuscated, but the heuristic firings and URL analysis point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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://druttle.ru/123?utm_term=how+to+make+origami+out+of+notebook+paper PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488592/normal_602463c1231d9.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/gie2qhb/kowegejomade.pdfIn PDF document text
    • http://midumadataresut.66ghz.com/87500318504.pdfIn PDF document text
    • https://cdn.sqhk.co/telazaje/jaeXjd2/34485833446.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/gcvhcgi/74740893235.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/heibugi/batosubigotazuxupelivome.pdfIn PDF document text
    • https://cdn.sqhk.co/gagobuniponi/jCoe4ja/32435033829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421630/normal_6012e195c1047.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/fiVpqml/konobifomokaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380223/normal_5fd2867ce724c.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/af6hahh/kung_pow_2_tongue_of_fury_release_date.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/sixenogafopoj/basuzudekizupamem.pdfIn PDF document text
    • http://lilufafuf.epizy.com/bofipowoxigewol.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/fijopemexazafabopimasa.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/baranauskas_anyki_ilelis.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/estrategias_de_comprension_lectora.pdfIn PDF document text
    • http://sogisujomixugo.epizy.com/49681141018.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_off0000e4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EE 5268 bytes
SHA-256: 719387e3e4be500b8f5fa025308261e3caa9a0f68d02216e73c81b9431c56f91
font_01_sfnt_off0000f6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D7 10616 bytes
SHA-256: 1f6431ec8c45d875e69c3eb693537daaf9f6d55896f7d911d26047a03fde735d

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