Malicious PDF — malware analysis report

Static analysis result for SHA-256 746f1b8994196631…

MALICIOUS

PDF

84.4 KB Created: 2021-05-16 04:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d3c86b9c6a2eca45bddfd1ad2ad0b696 SHA-1: de0875e9d83df7221cd139117ed54bdd9f75dd32 SHA-256: 746f1b899419663189baf16ba3b4c3a008a473a1f25575fa86d85de91207582b
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains a reference to "Burger King nutrition whopper with cheese" which likely serves as a lure to disguise the malicious intent. The presence of numerous external URIs, including the primary malicious URL, suggests the document is designed to redirect users to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/strik?utm_term=burger+king+nutrition+whopper+with+cheese PDF link annotation
    • https://cdn.sqhk.co/luwagoma/ahayjcR/gesitudovaso.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/HgDjagh/nuwuveligulidamezewinu.pdfIn PDF document text
    • http://nuveclovet.xyz/facebook_messenger_video_call_android_not_workingtnyqr.pdfIn PDF document text
    • http://subonus.ru/jewedalemojozelijherv4.pdfIn PDF document text
    • https://dukuvewag.weebly.com/uploads/1/3/4/0/134041028/da7cc0500815.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/giii4y2/top_android_phones_2019_uk.pdfIn PDF document text
    • http://sumigemag.mywebcommunity.org/definition_of_development_communication.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/mujobijebusad.pdfIn PDF document text
    • https://kalakibujupe.weebly.com/uploads/1/3/0/7/130740073/xazido-torogozitu-mabijap.pdfIn PDF document text
    • http://profaudit32.ru/98360658176ll2ye.pdfIn PDF document text
    • http://kidupat.getenjoyment.net/abatorul_5.pdfIn PDF document text
    • http://maturibcgj.space/zitekixini8g8ct.pdfIn PDF document text
    • http://fb-copyright-help-from.com/el_vendedor_mas_grande_del_mundoi0dma.pdfIn PDF document text
    • http://energierecrute-emplois.com/declarative_and_interrogative_worksh566d8.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/sorovog-jomagofog.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/FhfuK0g/flight_club_consignment_phone_number.pdfIn PDF document text
    • http://idealica-it.website/bopaviwabunugobebepipl0k1k.pdfIn PDF document text
    • http://dusanaputojinon.mygamesonline.org/historia_de_la_administracion_cientifica.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://posijibanif.epizy.com/didewijomupixonu.pdfIn PDF document text
    • http://kojaburu.epizy.com/3d_printing_additive_manufacturing.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/familia_cervidae.pdfIn PDF document text
    • http://xitutudatiri.epizy.com/pawimi.pdfIn PDF document text
    • http://noporotosodapo.epizy.com/a_clash_of_kings_plot_summary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF66 5040 bytes
SHA-256: a4e8c30a69796e8960f552952d0b5b5b9a421e22d55dbf3e5bae126d0fa5cbae
font_01_sfnt_off000110a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A0 10944 bytes
SHA-256: 0bf40d5f8ef0271110001f37cef5b22baabecd189dbc1153bae5b6dbd824f29e
font_02_sfnt_off000135e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e