Malicious PDF — malware analysis report

Static analysis result for SHA-256 229bf518c2ddbfb9…

MALICIOUS

PDF

84.0 KB Created: 2021-03-20 21:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2a712d56e0f7e1495e84fc1d76ce0f6c SHA-1: 96aca234da22eb0b1e904512e5a04ade9c210fba SHA-256: 229bf518c2ddbfb97db7bf9e81057c3062475ffe114d817318f5f1f47b64ce9c
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also flagged the PDF with high confidence. While no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://dafemum.ru/wix?keyword=francisco+perez+yoma+copeva In PDF document text
    • https://cdn.sqhk.co/wareberefiz/jgyRKgi/beercave_racerback_tank.pdfIn PDF document text
    • https://cdn.sqhk.co/zowajomi/fhijhjd/foxuwoj.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/ji7njin/chromecast_built-_in_amplifier.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/are_chocolate_dapple_dachshunds_rare.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/iichcjd/tutawijonagovema.pdfIn PDF document text
    • https://cdn.sqhk.co/vonewesipan/jhgegdC/99387398186.pdfIn PDF document text
    • http://tonobipuko.iblogger.org/taguzifol.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/dfgcifN/52078977895.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/ijHhag9/sisters_of_charity_hospital_er_wait_time.pdfIn PDF document text
    • https://cdn.sqhk.co/jowibigodene/iasmzji/12693352021.pdfIn PDF document text
    • http://jutidewolojura.mypressonline.com/how_to_do_magic_loop_cast_on.pdfIn PDF document text
    • http://bulakirip.getenjoyment.net/wediruk.pdfIn PDF document text
    • http://muvepifare.mygamesonline.org/nsw_public_sector_capability_framework.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/jc5gigi/69517923917.pdfIn PDF document text
    • http://bowuvudofi.scienceontheweb.net/34529253203.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/hhQnghn/new_tips_for_azar_chat_live.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/jjgf6jb/55457606057.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/SkOgcUH/frases_de_amor_en_ingles_tumblr_traducidas_cortas.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/wjaiis2/pocket_plants_apk_full_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/gcshcig/wheels_on_the_bus_guitar_chords_melanie_martinez.pdfIn PDF document text
    • http://pagexonani.iblogger.org/tafowifojogokovisoxum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rixibedi.onlinewebshop.net/max_weber_on_social_class.pdfIn PDF document text
    • http://lebusepuwiri.atwebpages.com/sokibadev.pdfIn PDF document text
    • http://pesufebavarobi.rf.gd/29360812687.pdfIn PDF document text
    • http://venuxekokufago.rf.gd/56593130601.pdfIn PDF document text
    • http://kuxemozoxabonag.onlinewebshop.net/vekajox.pdfIn PDF document text
    • http://tosivasode.epizy.com/jozikujefifoduno.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_off00010734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10734 5212 bytes
SHA-256: 3382a5d40c681b0261a010c37fec6652d989648600c7de2ec64234d6a4d349ef
font_01_sfnt_off000118f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F2 12136 bytes
SHA-256: b62e5fa071134eb8caf7154d4c3e4d14703049f6e0d50ce02b06bc2f9b3da4f4