Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce7a0c8dd44a407…

MALICIOUS

PDF

83.6 KB Created: 2021-03-28 22:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 9f19725d5dc6cf06db79fa5764b0f2dc SHA-1: 5399814836da31e875dad38972a1dad5ac928aa8 SHA-256: 8ce7a0c8dd44a407755247d2b218759e10c8ae5c36503b7ef110b5656c414f28
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains text related to search terms and application metadata, reinforcing the idea of a deceptive lure. No scripts were extracted, but the overall structure and URL analysis point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bologen.ru/wix?keyword=barnet+vermont+school+district+map PDF link annotation
    • http://rujisuki.mygamesonline.org/building_construction_book_by_rangwala_free_download.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/suvibepemebazub.pdfIn PDF document text
    • http://misifebofol.mywebcommunity.org/bncc_educao_infantil_mec.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/gdjgcih/linatanivevawasekek.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/39308047764.pdfIn PDF document text
    • http://bibuwobu.22web.org/20649171464.pdfIn PDF document text
    • http://nijewogifuzazi.mypressonline.com/zunajipenulada.pdfIn PDF document text
    • http://zivemigidefis.mypressonline.com/zitoxomiseligolutixi.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/samsung_series_6_55_inch_smart_tv_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/sowumavag/d6iblTe/dedaxezepozunikusimi.pdfIn PDF document text
    • http://nufapivevavenak.22web.org/93541789734.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/O26hfuA/45885013123.pdfIn PDF document text
    • http://lulilafemavivog.mygamesonline.org/sudipuvamazorelunonut.pdfIn PDF document text
    • http://nubatevujonuw.mygamesonline.org/pikovezokiwasobuwifi.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/Mfiaegi/millionaire_trading_mom_1k_club_reviews.pdfIn PDF document text
    • http://jadaribod.mygamesonline.org/cahier_d_exercices_le_nouveau_taxi_1_answers.pdfIn PDF document text
    • http://vexasefagi.scienceontheweb.net/junuju.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/ifOjdKG/vojifajedarawamuduwa.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/0f4a4c2f-7115-4cf5-90d6-bc69b0d440cd/88028941291.pdfIn PDF document text
    • http://sejekaxupoze.epizy.com/tamil_songs_for_mobile_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd65fbdc-80a9-4652-815b-467aa9cf256a/wajaf.pdfIn PDF document text
    • http://rivenoke.onlinewebshop.net/16981556642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dcc1ea5-6d5d-47b3-a285-058b60a30a2b/what_is_the_meaning_of_the_term_educational_psychology.pdfIn PDF document text
    • http://wovuluvoju.onlinewebshop.net/18818396893.pdfIn PDF document text
    • http://zuputes.atwebpages.com/ccrn_pulmonary_review.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 5424 bytes
SHA-256: 1a6bef73d8fcac318606f26ead7fad64e166b1130a7ff040c74630267c0e5802
font_01_sfnt_off000100a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A3 12300 bytes
SHA-256: 0d406f2012df764168fe9d780da46b5dc95ff1bdf0aedecbba7bc5644bcf0eca
font_02_sfnt_off00012976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12976 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e