Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9561e4a2d75cbbb…

MALICIOUS

PDF

124.3 KB Created: 2021-04-04 15:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8ba5c74d257e170a35bf3605e5a105a SHA-1: d702efb996694310b8c01104eba909a399b167b4 SHA-256: c9561e4a2d75cbbbcd885963646b000d4f3304094626782470469bcf93a2bddc
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, one of which is highlighted by heuristics as an external URI. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://midufefew.ru/award?keyword=la+celestina+resumen+por+capitulos+pdf
    • http://bapatavusirave.mygamesonline.org/varobovuno.pdf
    • https://cdn.sqhk.co/devuzemalut/dOqhagc/red_velvet_swordtail_fish_for_sale.pdf
    • http://bonozowibewoz.mypressonline.com/amazon_web_services_course.pdf
    • http://vuzuwul.getenjoyment.net/case_files_internal_medicine.pdf
    • https://cdn.sqhk.co/guvevifowo/j7iigdY/diafragma_anticonceptivo_efectividad.pdf
    • https://cdn.sqhk.co/disumuneriva/fm2ggjd/jivonezekeziwugivevok.pdf
    • http://fherixq.com/mesobek12ps.pdf
    • http://malespw.xyz/why_is_my_ninja_blender_blinkingrf3ph.pdf
    • http://jibakerutev.mypressonline.com/vojebuteketilugufitu.pdf
    • https://cdn.sqhk.co/rujoremebi/aoF3KmF/9537036049.pdf
    • http://setopin.mypressonline.com/jiditekedudakar.pdf
    • https://cdn-cms.f-static.net/uploads/4391326/normal_5fe8ff1c20546.pdf
    • https://cdn.sqhk.co/gixelotopa/gjehjyM/91946452090.pdf
    • http://nosixavol.sportsontheweb.net/pap_smear_screening_guidelines.pdf
    • https://static.s123-cdn-static.com/uploads/4445866/normal_60013d3225bbe.pdf
    • https://static.s123-cdn-static.com/uploads/4378175/normal_5fe21bbd813c9.pdf
    • http://presalon.xyz/how_do_i_contact_fedloanknnis.pdf
    • http://sibogufurab.medianewsonline.com/definicion_de_temperamento_en_psicologia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xiwozoget.atwebpages.com/sexual_reproduction_definition_in_science_terms.pdf
    • http://radiviwix.onlinewebshop.net/antibiotic_sensitivity_of_staphylococcus_aureus.pdf
    • http://pekiluji.atwebpages.com/23939593646.pdf
    • http://sutexuvidag.myartsonline.com/simple_birth_plan_template.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001aae7.bin
6f9b4777174e9533acc4337bf8b083f76129087b0c19ddc591985b5d90a514c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAE7 5240 bytes
font_01_sfnt_off0001bca5.bin
4bde7a276380fbc314387ab9bcd567c4b072ce910d88d513056a40ead3070f66
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCA5 11876 bytes