Malicious PDF — malware analysis report

Static analysis result for SHA-256 30894a5878fd041b…

MALICIOUS

PDF

75.4 KB Created: 2021-05-02 05:35:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 90e57cae6fe80e822f2f860d1b4b30e1 SHA-1: 5bd195226500f05a1c3bbeb41663f1438b95189c SHA-256: 30894a5878fd041baf31cc72f5c67ec28bb8d4e99d1695e9133e6dd7c78c3428
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/strik?utm_term=how+to+get+tested+for+sleep+apnea+at+home PDF link annotation
    • http://jikusofare.mywebcommunity.org/xufaxixonipoxa.pdfIn PDF document text
    • http://wizapivizesib.mygamesonline.org/27852755126.pdfIn PDF document text
    • http://gebevojika.mygamesonline.org/belize_city_map.pdfIn PDF document text
    • http://buloshnaya.site/nelson_pediatric_symptom-based_diagnosis_free_downloadbma6x.pdfIn PDF document text
    • http://eu-study.ru/pusopasatu2eduw.pdfIn PDF document text
    • http://hookup753.fun/farming_usa_2_cheats_iosjpbui.pdfIn PDF document text
    • http://znatural.space/xuxubizanuro1bq27.pdfIn PDF document text
    • http://lofoporubatul.mygamesonline.org/78574316973.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/jesidofefe/hp_elitedesk_800_g1_price_in_karachi.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/tefowifogojew.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/capm_certification_study_guide.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/cash_flow_statement_problems_and_solutions.pdfIn PDF document text
    • https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_b3274e276df144508b988f0411f040e8.pdf?index=trueIn PDF document text
    • http://nejarisiwudu.atwebpages.com/lojolaxakefozibusixota.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/momifimulifejowegedabemo.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/hunger_games_mockingjay_symbol_meaning.pdfIn PDF document text
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_889d877e0a7b4aca8ec042e69aec93b6.pdf?index=trueIn PDF document text
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_933c697b780b48368a6451e975daed07.pdf?index=trueIn 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_off0000eb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB21 5508 bytes
SHA-256: 5c4738aff3dcbb8f932b7013c5ab9a322607acc85bdfc1616d8292920b891e3b
font_01_sfnt_off0000fdca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCA 10112 bytes
SHA-256: f3660c0cd9eeee2d33925990ec607a33474a802bb8211579c50494947761704b

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