Malicious PDF — malware analysis report

Static analysis result for SHA-256 4646f36bd7aa4dcb…

MALICIOUS

PDF

81.4 KB Created: 2021-03-07 14:20:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: dfea5dcbcd8209a168d09eba3e7a5b27 SHA-1: dbe79ee691e0cf745c6dc7311ff42ad62695e5cc SHA-256: 4646f36bd7aa4dcbec2fc70660752a4a373004d002b04e89614560aa36ba6233
126 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, including external URI redirection and ML classification. The document body, though heavily obfuscated, appears to be a lure related to a search query, directing users to a suspicious URL. The presence of numerous links and disposable hosting suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/strik?utm_term=does+dorian+grey+die+in+penny+dreadful PDF link annotation
    • http://rosovutuwonemis.iblogger.org/69602126832.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425238/normal_5fe040d9be64c.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/idhdig6/zifidexawezopesi.pdfIn PDF document text
    • https://cdn.sqhk.co/bexexoro/iQRhfja/91117443404.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416136/normal_5ffe6311e3383.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501029/normal_5fc8af3a5a36c.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/hhlgj1t/hide_online_hunters_vs_props.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485710/normal_601dcb8eb90e1.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/GTSgdF5/horrible_histories_william_the_conqueror_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/rakujolo/aw60icD/samsung_payment_pin_setup.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/saziwijaxodav/bridgit_mendler_hurricane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c15e5f-ecc0-4e6d-a9cc-905b3acdf31d/42648813173.pdfIn PDF document text
    • http://jexititojule.rf.gd/how_to_measure_absorbance.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/chinese_herbal_medicine_materia_medica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e5e230-17f3-43a7-b775-3e037c6a6566/66262148572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b6c7f2-d617-47a6-b56b-a703b9b5ff1c/95949028198.pdfIn PDF document text
    • http://fuwasal.rf.gd/division_by_two_digit_numbers_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/paxevisisu.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/marketing_management_by_philip_kotler_15th_edition_ppt_free_download.pdfIn PDF document text
    • http://neropexuzex.rf.gd/80620280836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/947facb6-b0f3-4858-bfe3-2f01cb73cb29/verojezigugevuzadarimofeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77d99198-7c8b-46a4-b775-e7f6307b3693/what_is_sequence_connectors.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/11053489001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4da996b7-20e8-4ce6-8428-c40824d74399/48215282661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89bb05cc-796c-42c2-a152-c03dfcee13fe/taguneliratitalela.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_off000100d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D6 5308 bytes
SHA-256: 15a4fcbbdc92eeaa34dfe1de845d3f81ab085d1b057c2054a185d1dca805b7f6
font_01_sfnt_off00011305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11305 10852 bytes
SHA-256: 12800581317bd6b9d2d219d282fdf8ed67ef5ed4f4877a490b6559654818a6b3