Malicious PDF — malware analysis report

Static analysis result for SHA-256 79295353ab14baae…

MALICIOUS

PDF

76.9 KB Created: 2021-04-25 07:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: efa1855927be6b6102d81c756ba704cd SHA-1: 284dc581716f9848187e8241883eb52adc101a09 SHA-256: 79295353ab14baae476e1ebb5bc79d8ae8ae1f0cdb52dcbeed653c236bb17e2a
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text is obfuscated and appears to be a lure related to NFL Sunday Ticket, designed to trick users into clicking the malicious link. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=is+there+a+way+to+get+nfl+sunday+ticket+without+directv In PDF document text
    • https://cdn.sqhk.co/kizulajeli/gggJpie/joridaseronuk.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/UyJ6Tuw/24833733887.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/javascript_tutorials_point_free_download.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/dulce_et_decorum_est_analysis.pdfIn PDF document text
    • http://sifuzifixezija.medianewsonline.com/metro_amsterdam_mapa.pdfIn PDF document text
    • http://carinsusa.com/pudalajotesemegumutar5qbfc.pdfIn PDF document text
    • http://tazuwaxibasozi.22web.org/convert_into_word_document_mac.pdfIn PDF document text
    • http://jarowulizose.sportsontheweb.net/97459921467.pdfIn PDF document text
    • http://usesol.xyz/40788904679ez1dw.pdfIn PDF document text
    • http://zoneeuro.pro/why_is_my_bosch_dishwasher_not_drying_properlyvcjxr.pdfIn PDF document text
    • https://cdn.sqhk.co/ferobisuw/bjdq9hi/best_modern_sculpture_artists.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/AidCcK2/36003942208.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vemafefureja.epizy.com/10963183947.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/jemanebolumibuboz.pdfIn PDF document text
    • http://lajuloverebob.epizy.com/kepudijisapidojoz.pdfIn PDF document text
    • http://zapulozamatuwe.epizy.com/story_of_english_language.pdfIn PDF document text
    • http://piduvazudofem.epizy.com/18499665838.pdfIn PDF document text
    • http://julugupebuje.rf.gd/suxezesagijuw.pdfIn PDF document text
    • http://tisajepi.epizy.com/wanowozezajozawovipapob.pdfIn PDF document text
    • http://zunedolu.rf.gd/favabikiresenokeso.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_off0000e825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE825 5536 bytes
SHA-256: b38b65a4af5c5932115385dab9e170e822ef05693628664551a064a730a3b6f7
font_01_sfnt_off0000fb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 11820 bytes
SHA-256: 98fa8d7ec375355a8a2ef8a346878dd739241ce05ffe50c2b9a91cd4ab766b9d

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