Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f5ff69a54c758f…

MALICIOUS

PDF

79.4 KB Created: 2021-05-06 05:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f59ba40356de76497a390d5f7cf33521 SHA-1: 6eb471cf200c743a62c66eebe100ef3ed68d096e SHA-256: 68f5ff69a54c758f85e44fe95721e1c187571f7ff760a8b6bbceeed8b550fc2a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pelibifir.ru/strik?utm_term=indian+camp+ernest+hemingway+deutsch+%25C3%25BCbersetzung PDF link annotation
    • https://mabelemaje.weebly.com/uploads/1/3/4/7/134705401/kinavosu_lorirodalod_budinulepigo_jolameguziz.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/camp_counselor_job_description.pdfIn PDF document text
    • http://merogerofame.66ghz.com/expense_trends_excel_template.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/ifighfx/gunship_iii_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/eVWhc1z/61200800713.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/ijER8ib/62185162237.pdfIn PDF document text
    • https://gudejebomuxuvu.weebly.com/uploads/1/3/1/8/131856108/guzuwibedavaso.pdfIn PDF document text
    • http://tonojodozif.mypressonline.com/ejercicios_resueltos_caida_libre_y_tiro_vertical_4o_eso.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/regiwaravitovateba.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/11963870857.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_2daffa2c49e14d1e9d4959f60c6c29fc.pdf?index=trueIn PDF document text
    • https://5c51e3d7-2896-491e-a255-1b002e356b93.filesusr.com/ugd/5b6ce5_e2e8945087f14e9389a92a152d1f48f3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e9526e-e461-4cf4-85b8-57bcaa69c27c/93411795387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c93a547-29ce-4720-964f-f4dfaabc5c04/captain_underpants_and_the_sensational_saga_of_sir_stinks-a-lot_the_twelfth_epic_novel.pdfIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/21587966850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1088680d-4366-4673-9409-526f4a14d5c6/how_to_practice_self_control_with_anger.pdfIn PDF document text
    • http://niwarapa.epizy.com/22042651165.pdfIn PDF document text
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_6e9d82b4877c434e821b59d78d19ea1f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9214a61-40ab-477a-88da-b03dfa1fc37c/74738862229.pdfIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_882fb5bfde4b48968c40f64be5f351fa.pdf?index=trueIn PDF document text
    • http://jidusepagezet.epizy.com/marvel_live_wallpaper_iphone_x.pdfIn PDF document text
    • http://vekifaxofezawe.epizy.com/arlington_va_hotel_tax_exempt_form.pdfIn PDF document text
    • http://joriboka.epizy.com/gotozalevaxajev.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_off0000f580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF580 5896 bytes
SHA-256: 7435ca752779fadd42450bbe016e1f0bf22770f22d8fc7669ccf508019a1d562
font_01_sfnt_off0001094c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 10976 bytes
SHA-256: 8d21243a6debf4187c481ee9e229e6bba5f11f56e842a9fcfcbe472b5e28ded9