Malicious PDF — malware analysis report

Static analysis result for SHA-256 88f4ac31bf0c338f…

MALICIOUS

PDF

72.8 KB Created: 2021-03-01 00:33:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 095628e89c3b78f3384b0e7c474544fa SHA-1: fa2604ce6321bdc3d623d8960ae7d361f0404081 SHA-256: 88f4ac31bf0c338ff133fd5c78b9f53177e3665fe582c3b2e3358d9d5e4f5513
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The embedded URL is the primary indicator of compromise, suggesting the document is a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/123?utm_term=how+to+choose+manual+network+selection+iphone PDF link annotation
    • https://cdn.sqhk.co/gokovolasula/XhihjiO/3095845884.pdfIn PDF document text
    • https://cdn.sqhk.co/tifozeborot/xielYjh/wasepav.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/ifiad5r/44212116560.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/51249796398.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/df6jcLy/setizidarezamuta.pdfIn PDF document text
    • https://cdn.sqhk.co/bunewonu/gcH2Yja/ice_cream_flavors_zodiac.pdfIn PDF document text
    • http://pupezawat.scienceontheweb.net/kozalotes.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/do_xbox_360_remotes_work_on_xbox_1.pdfIn PDF document text
    • http://mebel-albero.ru/angular_form_email_validation_not_workingxy2qy.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/idhigfB/munagoganib.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/should_i_go_to_disney_world_in_january.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/48047724881.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/angularjs_form_validation_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/denosikasodurimixekiru.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/what_if_netflix_recap_episode_5.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/oklahoma_statutory_form_warranty_deed.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/last_of_the_summer_wine_episode_guide.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_off0000e17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17A 5292 bytes
SHA-256: 6cac00b1429a403da30d0f17621d5cf9cf689e351ae99d746d19a2c3187528ae
font_01_sfnt_off0000f356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF356 9976 bytes
SHA-256: 1ec7b44181ea55db23a2a72c3f66317225db124201cd0a564f17238c156d0298

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