Malicious PDF — malware analysis report

Static analysis result for SHA-256 54cc940410fc3f80…

MALICIOUS

PDF

78.1 KB Created: 2021-03-15 15:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 007340f6724d10572f2fd0bc6716b688 SHA-1: 4b427f198556c7984c1b97999e488dd6b75ee9c1 SHA-256: 54cc940410fc3f80b2da327ffaea659c9369f940dd61709877e0e5e37ec69c49
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary URL, 'https://zajinet.ru/award?keyword=metales+alcalinos+propiedades+fisicas+y+quimicas+pdf', appears to be a lure for academic-related search terms, likely leading to a phishing or malware download page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://zajinet.ru/award?keyword=metales+alcalinos+propiedades+fisicas+y+quimicas+pdf PDF link annotation
    • http://likefetevu.getenjoyment.net/riwavofilufutisidenoj.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/97549464812.pdfIn PDF document text
    • https://cdn.sqhk.co/guwezasov/iaKjfih/samsung_calculator_source_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476294/normal_600517f686d81.pdfIn PDF document text
    • https://cdn.sqhk.co/wigalefu/jegdChg/nomanib.pdfIn PDF document text
    • https://cdn.sqhk.co/ruperodu/ieghjiX/tekapenogaziwaxawi.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/50581626778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402711/normal_5fdc3c894586f.pdfIn PDF document text
    • https://vazaratel.weebly.com/uploads/1/3/4/0/134017227/pedozajediniw.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/clRIWig/grow_credit_union_brandon_fl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494417/normal_5ff5a3c7396e0.pdfIn PDF document text
    • https://loniforuwo.weebly.com/uploads/1/3/4/9/134904684/9901331.pdfIn PDF document text
    • http://niwizonoleror.mywebcommunity.org/citizen_eco_drive_calibre_8700_manual_set_date.pdfIn PDF document text
    • http://fejavodexata.getenjoyment.net/84100611406.pdfIn PDF document text
    • https://kepijiloxa.weebly.com/uploads/1/3/4/1/134108658/0c43f3bba21c152.pdfIn PDF document text
    • https://cdn.sqhk.co/mobobelelu/eidNJ4v/sapapifuxedunanonoxopam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473963/normal_6021a2d8f198f.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/gepaliwonupej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1ba2d6-5827-4965-bb5e-60bc6f56a215/how_do_you_calculate_a_15_tip.pdfIn PDF document text
    • http://fozozip.onlinewebshop.net/mahalakshmi_ashtakam_lyrics_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce390d67-6a91-4803-bb8b-787023ea5ac6/luxebavesasoloxosagane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d13fbc3-b85a-493e-b56d-0f0d7e388661/lapuzivoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d372a12d-ce3b-4281-a1cb-20c5615c5d05/is_bose_soundsport_free_compatible_with_android.pdfIn PDF document text
    • http://kitilogokufalu.atwebpages.com/zifetopezivumitepug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c43e95c-ee59-469c-9bde-2110c2628e24/how_to_advertise_a_small_business_on_social_media.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_off0000efe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE6 5532 bytes
SHA-256: c625486b2e73acb739acc30a192065c6e6572b99db1daf9d4c1d03d8c2058d80
font_01_sfnt_off000102bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BB 11492 bytes
SHA-256: 33ee6e807319cd3b3cf713776f16af9b9f7eb5437b3625691c0bcc848dd983ec