Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c29905e5661c16…

MALICIOUS

PDF

73.9 KB Created: 2021-03-28 11:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d93e97c6e8c85926d257ccccee5ea958 SHA-1: a80805e6cb56871ab5b2bfd00ddeeafec4b85940 SHA-256: 27c29905e5661c1637a7df86eea59529d6a389163bc1651b85ccda234134f69a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed to host many PDFs. One of the primary external URIs, 'https://xezojetit.ru/123?utm_term=catherine+palace+audio+guide', suggests a lure to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/123?utm_term=catherine+palace+audio+guide PDF link annotation
    • http://tonukavugu.mygamesonline.org/41560387037.pdfIn PDF document text
    • http://zagejudivavi.sportsontheweb.net/tovunuroziwite.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://kererivodukeje.weebly.com/uploads/1/3/5/3/135303009/9188244.pdfIn PDF document text
    • http://limuzinof.ru/is_chevy_equinox_a_reliable_car6zwgc.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/how_to_open_casio_fx-9750gii_calculator_box.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/dijogelazelivixopovkesz0.pdfIn PDF document text
    • https://xowogibudul.weebly.com/uploads/1/3/4/4/134446034/fukano_kejadubamixiv_jifutebimovoko_xobogoperus.pdfIn PDF document text
    • https://rixafivi.weebly.com/uploads/1/3/1/3/131380000/31287d8c22b71.pdfIn PDF document text
    • http://arthromedro.xyz/organigrama_empresa_definicionkokn9.pdfIn PDF document text
    • https://xowogibudul.weebly.com/uploads/1/3/4/4/134446034/gopugojudubujexomovi.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/the_talented_tenth_web_dubois.pdfIn PDF document text
    • http://barberking.best/jubexudujetinakezorepanuybnpd.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/kefodek/cazadero_performing_arts_family_camp.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/l1_dependent_visa_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/radio_broadcasting_script_english_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/rimeduxemajo.pdfIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/cannery_row_book_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/megozevaduviwili.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_off0000e418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE418 5060 bytes
SHA-256: 8b4c16120bc03a62802bdaf8c5eab827c341d70b1dd16c798bb579f5d42f4d58
font_01_sfnt_off0000f547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF547 10956 bytes
SHA-256: 62236f84edc03cdb6172dd3e276d0374809a7c3ab19a63317549aae51e44d5f2

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