Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bfac18630c07692…

MALICIOUS

PDF

76.0 KB Created: 2021-05-14 00:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2e55b59756b8b8928a8b464c1ebd5a66 SHA-1: 938c4afd7becac0fd456b86fb4ad35739c0f7cd0 SHA-256: 9bfac18630c07692e18dbc7c46f4f1d5715fe6a6aa67e7bb13ecfacb3724dc1b
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, which is a common tactic for phishing or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful 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
  • 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://jottigo.ru/strik?utm_term=para+que+sirve+el+te+de+manzanilla+menta+y+anis PDF link annotation
    • https://cdn.sqhk.co/ruduligived/qvrginK/povowawale.pdfIn PDF document text
    • https://cdn.sqhk.co/juduxijumijo/fehdXyM/crossfire_survival_shooter.pdfIn PDF document text
    • https://cdn.sqhk.co/vekudaselux/UOibnij/alfabeto_em_ingles_para_imprimir.pdfIn PDF document text
    • https://cdn.sqhk.co/fusifanux/gdhjGiF/movie_creator_software.pdfIn PDF document text
    • https://cdn.sqhk.co/fapebenu/zw2Qvji/report_folders_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/laripikiwafo/ehejehc/retro_video_game_collecting_tips.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/u3EhakT/mcq_on_competition_act_2002_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/mafomawoxali/rijhjiV/falifiparasirutebit.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/jit4Oz4/94971027819.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/dja0fKB/gipobukexifopipimamila.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/29c49abf-05e6-4a6d-a419-d4857c4dbe09/mechanical_maintenance_engineer_jobs_in_abroad.pdfIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_4e194f0415f24ebe819b388571f5fff7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/multiplication_worksheets_ks2_year_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ff2249-cc01-44e4-8c89-3758b3c460c7/what_is_a_blind_nil_in_spades_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/garmin_nuvi_2589lmt_battery.pdfIn PDF document text
    • https://2efabd41-1f95-43d0-8245-5f8eb9267247.filesusr.com/ugd/2f4ddf_037fe7a19bd04008931e9e55f7f64f1c.pdf?index=trueIn PDF document text
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_ad4128faa39a42c286ac90b10b1cd106.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizup/ibn_kaseer_tafseer_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d3f5b9-06c2-4fd8-81f5-238815364575/janajepabeti.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_off0000e9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EF 5312 bytes
SHA-256: 2e02b460606da9e419c8bf13f1158042a3de4071839c3c44e992e24ce35e72a0
font_01_sfnt_off0000fbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFD 11968 bytes
SHA-256: 645d8b8fd8e2414611d6cf5654c1920888c5255fbd82a9c7bedbfab6085c36ac

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