Malicious PDF — malware analysis report

Static analysis result for SHA-256 9396ef2e13140afe…

MALICIOUS

PDF

89.4 KB Created: 2021-02-08 00:42:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fe5851ef0790d435d4898834a88e60d3 SHA-1: 425570749ee10019084413aa2388b184e358c939 SHA-256: 9396ef2e13140afe4602d3512ffd3e0b5021e379e32e0eb57e4324fbae1cd99b
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain search terms, suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware download sites.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/123?utm_term=the+lion+king+full+movie+stream+2019 In PDF document text
    • http://changepass.online/431274860809n489.pdfIn PDF document text
    • http://smartcoin.design/b_cn_ngha_l_gv187j.pdfIn PDF document text
    • http://probkin34.xyz/globalisation_class_10_noteso71or.pdfIn PDF document text
    • http://hookup153.fun/digirazekuvozixrtn77.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/la_boite_a_merveille_resumuh9sw.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/dychcic/twitter_careers_new_grad.pdfIn PDF document text
    • http://pay-order.info/catfish_bait_near_mejay6y.pdfIn PDF document text
    • http://women-ita.space/30144535640c05no.pdfIn PDF document text
    • https://cdn.sqhk.co/motulobugaji/LhhdjhW/jibupisedo.pdfIn PDF document text
    • http://future-techno.ru/fovukore1sqcj.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/iv6ichh/741172787.pdfIn 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://s3.amazonaws.com/zuvovoxigumuz/puvozamapepenog.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/calendar_word_format_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/69159244634.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off000130c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x130C9 17020 bytes
SHA-256: 0c73d919c4ea599a30ebf1f213da8af078b5c0b048b82cafe5b80fb629351bf5
font_00_sfnt_off0000f22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22B 5736 bytes
SHA-256: 5863ad6fb34de25750afece6b996900ac42d7a3344d22d2f6783e1ee75518fcf
font_01_sfnt_off0001058e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058E 14536 bytes
SHA-256: 3758b73b808fd06535cdd73f89ebeb83fe06ffd036f2bb54e505398c465650d8
font_03_sfnt_off00014970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14970 3172 bytes
SHA-256: 5ef7be8fb0eb12fcc49c96fa948c634ea8b80d8e85755116f65c45ed880d26b1

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