Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db0348a70556a51…

MALICIOUS

PDF

85.7 KB Created: 2021-04-01 23:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6db274d00a5c7e559893509fe7b3ba26 SHA-1: 7954726cfb9e4cabf51ab73ce2b72d226aa6114e SHA-256: 9db0348a70556a51a1a543b639e4897e042b94a1f32d9c907527e5421803522a
146 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. It uses a QR-code lure. 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 0.9967

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://mezovuduw.ru/strik?utm_term=100+deadly+skills+combat+edition+pdf PDF link annotation
    • http://evakuator-uga.ru/ruwifomanenise8k4wn.pdfIn PDF document text
    • http://fenellalucynelle.info/torewelebifadonifujiheyb9.pdfIn PDF document text
    • http://reabook.online/panasonic_cf-53_toughbook_drivers3cjp8.pdfIn PDF document text
    • http://devlp.club/odyssey_book_21_summary_shmoop91r53.pdfIn PDF document text
    • http://fufibubesex.iblogger.org/ic_engineering_meaning.pdfIn PDF document text
    • http://reform-st.ru/aeneid_david_westuousd.pdfIn PDF document text
    • http://jonusawa.iblogger.org/the_marriage_covenant_samuele_bacchiocchi.pdfIn PDF document text
    • http://hotgirls.host/a_beginners_guide_to_day_trading_online_2nd_edition_downloadembgg.pdfIn PDF document text
    • http://mebelrostov.ru/govizatlvznc.pdfIn PDF document text
    • http://arendaavto.taxi/dd_5e_feats_tier_listljxan.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/degagaziv/42775557104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0f5e23c-8921-4279-826a-3ac2268ed59b/74130889670.pdfIn PDF document text
    • http://segukilu.epizy.com/acca_f5_bpp_exam_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/25284223527.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/73771644243.pdfIn PDF document text
    • http://wigelasipop.rf.gd/formulas_de_volumenes_de_los_cuerpos_geometricos.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/hindi_grammar_worksheet_for_grade_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a4a57f-7100-4558-8f8f-7ab36ec33a35/how_do_i_get_my_hp_officejet_pro_8610_online.pdfIn PDF document text
    • http://ruroratetibik.rf.gd/system_analysis_and_design_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e78dfb-fa8b-4351-8e8b-a785a641425f/79934187669.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/26192382522.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/41728409981.pdfIn PDF document text
    • http://dabenaguna.epizy.com/ludefizedadurizoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ea599b-fc86-4ec2-bbce-6d6f7ddabd44/sig_p226_p229_magazine_compatibility.pdfIn PDF document text
    • http://tivusanezidiv.rf.gd/acute_myeloid_leukemia_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4e67bce-52e5-45c2-afe3-883b0b62f4c5/the_fighting_ground_full_book.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_off0001100f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100F 5612 bytes
SHA-256: 78a2943719239032d987dab51d8860ee915ffc5916b94dd55f8bd7391c820d6d
font_01_sfnt_off00012326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12326 11136 bytes
SHA-256: 2f41599fdf4021bdeb3158cb70137a54e200af5e9fb4fab71f0fbeb60aef0bbe