Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ccb8a07a915ec9…

MALICIOUS

PDF

89.0 KB Created: 2021-05-07 13:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb9edde8ab7c88cff783198335d512ee SHA-1: e2e6e4cad70c60236b9a5dfb341450a3a1d1c842 SHA-256: e3ccb8a07a915ec996eda68b6cdff50a834baeec96e1909627cf44187c868337
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking documents, but one key URL, 'https://resalured.ru/strik?utm_term=girl+interrupted+movie+watch+online', is flagged as suspicious and likely leads to phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=girl+interrupted+movie+watch+online
    • https://cdn.sqhk.co/suvotoruwot/cicy0hd/gukapadixemunirimomi.pdf
    • https://tedotedonux.weebly.com/uploads/1/3/0/7/130775879/roboduwetilej.pdf
    • https://cdn.sqhk.co/vuxeneson/4vhfVjb/guzober.pdf
    • https://dimafivatoputir.weebly.com/uploads/1/3/4/4/134496040/6030353.pdf
    • https://cdn.sqhk.co/xunijejozi/gMhcheM/75476696047.pdf
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/5539980.pdf
    • https://fumasidabufip.weebly.com/uploads/1/3/0/7/130775820/2b8e4a660b37.pdf
    • https://suzotavuni.weebly.com/uploads/1/3/4/7/134765747/5624594.pdf
    • https://cdn.sqhk.co/levowexesu/aeTiho3/lesson_plan_free_printable.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fekaduvopigab/adobe_photoshop_cs5_brush_free.pdf
    • https://uploads.strikinglycdn.com/files/a0541fe6-a7d0-4560-9ae2-ec5b97accfca/spring_framework_example_github.pdf
    • https://uploads.strikinglycdn.com/files/fdcfbea3-7805-4246-9cc5-880fcd9d0360/kovoresudat.pdf
    • https://uploads.strikinglycdn.com/files/5672ec54-4c0a-41d4-b044-8ef915f53dd3/father_and_sons_pizza_chicago.pdf
    • https://uploads.strikinglycdn.com/files/97e3472b-a579-49aa-ad38-5a3bde599b7b/koxaj.pdf
    • https://s3.amazonaws.com/zamuriza/acer_aspire_one_cloudbook_14_ao1-431-c8g8_drivers.pdf
    • https://uploads.strikinglycdn.com/files/107c5d1d-fe1e-462f-a10e-0f79f1351507/grigori_grabovoi_methode_francais.pdf
    • https://uploads.strikinglycdn.com/files/09d15b51-b8b8-4c9a-9a1a-eb395e3da78e/sparknotes_taming_of_ofthe_shrew_act_1_scene_2.pdf
    • https://uploads.strikinglycdn.com/files/d2c85384-e90b-46bb-9177-83358ab9a780/dabamisemibawedavu.pdf
    • https://s3.amazonaws.com/pazerogasarinu/august_osage_county_full_play.pdf
    • https://s3.amazonaws.com/polexebuj/60049773265.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001128d.bin
aa4aab1bb2abbf231ec719c15679fa63abfb4821e47ac7ec265a77218fbeb079
pdf-font-stream PDF embedded font (sfnt) at offset 0x1128D 5200 bytes
font_01_sfnt_off00012416.bin
599275be88000b25fe920c4365b3c49a58057f409875cbf7aa345334a84714f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12416 10696 bytes
font_02_sfnt_off000148a8.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x148A8 4324 bytes