Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd164a484202d921…

MALICIOUS

PDF

73.5 KB Created: 2021-03-03 15:17:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1c301589d2e77cb2389dc23b439a1b47 SHA-1: 20a0df013a8d52fe7f513bd95a0d8d43efa9e9eb SHA-256: dd164a484202d9218a9c8253953040260d114bf050d3d0175f5865929da22372
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with at least one pointing to a domain associated with link farming and potentially malicious content. The presence of embedded URLs suggests an attempt to redirect the user to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wix?keyword=exact+answer+using+radicals PDF link annotation
    • https://cdn.sqhk.co/rogokivika/Xhdqgin/samurai_2_vengeance_mod_apk_unlimited_health.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/ajcidie/monexogara.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/how_to_use_telescope_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/shhggin/afx_slot_cars_amazon.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/how_much_does_it_cost_to_run_a_gas_wall_heater.pdfIn PDF document text
    • https://vivutavolid.weebly.com/uploads/1/3/4/3/134308799/dd91f4cea.pdfIn PDF document text
    • https://devigejijakefu.weebly.com/uploads/1/3/2/7/132740662/748015bd694e7.pdfIn PDF document text
    • https://gipenozup.weebly.com/uploads/1/3/1/0/131070487/gubutog_wabonibose_bovomo_xenesatajo.pdfIn PDF document text
    • https://ragojozuzaz.weebly.com/uploads/1/3/4/6/134668900/5427201.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gupizamowakop.myartsonline.com/why_does_my_wired_plantronics_headset_keep_beeping.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/73018653918.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/best_free_autocad_viewer.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/wibixerosiri.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/91526221376.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/59238124487.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/simplex_4100_fire_alarm_control_panel.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_off0000e261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE261 5224 bytes
SHA-256: 92fdf22f5e04a73150e33b8e672f42f231ec2145cabab397d402e1b9298b370a
font_01_sfnt_off0000f449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 10900 bytes
SHA-256: 0c8fd4f1f9e99f075f349ecb8f7b1ca8abc83e4f096d89dbe319ac808ac0cf75

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