Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3036a974d8cc054…

MALICIOUS

PDF

73.6 KB Created: 2021-02-09 16:02:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 868e62c37f5813476ba7313a408aab79 SHA-1: 07ead2710495796266b6cfdec6df9e5914292282 SHA-256: e3036a974d8cc054511dfd699b19279abc96bd4ac577b4b9071f4299a403d4dc
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to lead the user to a compromised or malicious site. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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://seumenha.ru/aws?utm_term=great+gatsby+drink+menu+template PDF link annotation
    • http://amsidisi.xyz/packed_bed_scrubber_design_calculationg5o85.pdfIn PDF document text
    • http://albatros-trans.ru/5210824377hzsa3.pdfIn PDF document text
    • http://originalhallyu.com/95913034155gn2n0.pdfIn PDF document text
    • http://robinmani.site/suroneroxoku8s1yw.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/cghychh/cool_boxers_underwear.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/jgjIgbj/96184879031.pdfIn PDF document text
    • https://cdn.sqhk.co/vojofarakiva/aghNWQy/50803550909.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/jdGifjj/49531859002.pdfIn PDF document text
    • http://easterthjg.com/geek_smarter_shopping_sitecpi1l.pdfIn PDF document text
    • https://cdn.sqhk.co/manewujunug/jRK06gi/vixepabefarebiselololo.pdfIn PDF document text
    • https://cdn.sqhk.co/piwewupovo/Pf01gho/kingdom_warriors_mod_apk_money.pdfIn PDF document text
    • http://eroganoficial.site/los_tres_cerditos_version_contada_por_el_lobom6q62.pdfIn PDF document text
    • http://twirlini.com/wv_dmv_permit_test_cheat_sheetqvr1f.pdfIn PDF document text
    • http://bupetud.xyz/407374929009b5m.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/ajbibES/aliexpress_ombre_human_hair_wigs.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/gloomhaven_cragheart_perks1l839.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/jguEsid/27120671187.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/Ejijchh/physiology_by_dr_vivek_nalgirkar_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FD 5616 bytes
SHA-256: 9c7dd200c63053df4faf91282ced3a765cb329e9e6b6d9a96a0c1bba4232e813
font_01_sfnt_off0000f50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50A 10708 bytes
SHA-256: aa66cadf56e4010ecfdde41d0f30263cb3606e4dd1737e36ef9c6086ba67b140

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