Malicious PDF — malware analysis report

Static analysis result for SHA-256 9637730fa37d4989…

MALICIOUS

PDF

77.8 KB Created: 2021-03-30 16:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a895c442e7074db6bc120f1bd8147bc SHA-1: 3a8798e35a1365a6a7fc44c3de2da69439abccba SHA-256: 9637730fa37d498937ed1805c525eb413a45e902fe7daac38392b146ef535bd8
104 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. The presence of embedded URLs and a heuristic for a download button lure suggests the document is designed to trick the user into downloading a secondary payload. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or malware distribution scheme.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/wix?keyword=showbox+android+app+apk
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/pulafubufifilijez.pdf
    • http://waxadod.22web.org/riwamazin.pdf
    • https://zabosete.weebly.com/uploads/1/3/1/1/131164473/2feccc668961d.pdf
    • http://jakusavu.sportsontheweb.net/55294234310.pdf
    • https://foravidamekog.weebly.com/uploads/1/3/2/3/132303307/f8ef7613.pdf
    • https://boxotegiperofog.weebly.com/uploads/1/3/1/3/131398000/5e69f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wekibik/60114311248.pdf
    • http://nevejekegasa.epizy.com/choir_music_free.pdf
    • http://petojijoxura.onlinewebshop.net/modified_asthma_predictive_index.pdf
    • http://kadizilurojiniz.onlinewebshop.net/94180092240.pdf
    • https://s3.amazonaws.com/supefujoxopubu/29432350739.pdf
    • http://notaruk.rf.gd/97916359726.pdf
    • http://lifobem.myartsonline.com/18834277888.pdf
    • https://uploads.strikinglycdn.com/files/36f0ecbb-c065-45a4-9fac-5d0e5870e1dd/wujuzezenewetup.pdf
    • http://junenizexi.epizy.com/introduction_to_automata_theory_languages_and_computation_4th_edition.pdf
    • https://uploads.strikinglycdn.com/files/ae86df74-9d46-4a4a-bb11-893ea6e4bafc/how_to_lower_dog_urine_ph.pdf
    • https://s3.amazonaws.com/xupovobejanam/how_to_fix_tension_on_new_home_sewing_machine.pdf
    • https://s3.amazonaws.com/kezemiradigu/zogivosu.pdf
    • https://s3.amazonaws.com/jopomodilamego/amor_en_los_tiempos_del_colera_pelicula_online_latino.pdf
    • https://s3.amazonaws.com/sajatofubote/big_sean_voices_in_my_head.pdf
    • https://uploads.strikinglycdn.com/files/58c43856-0cfe-4f51-b891-4ee289240393/what_is_uk_employment_law.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_off0000e6e2.bin
0140b3948bea84311a742554e5fdc589b0b3f79a47dbf5498bbc6a73e083ba1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 5304 bytes
font_01_sfnt_off0000f8f3.bin
488a2dc6bbdf51fd7564bdfb73acec2734d2e182e76466bf00373cbe6dc8e7d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F3 15068 bytes

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