Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7f558c4bb63b18…

MALICIOUS

PDF

77.2 KB Created: 2021-03-08 23:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3488a4547774a25beb20fa809bbeab7 SHA-1: 1800e752883537c87d118091322587ebcdd1e945 SHA-256: ac7f558c4bb63b180f889cf8c88aec69289a44fa972610beea27147d2f3a5662
96 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, with heuristics indicating the presence of external URIs. The embedded URLs suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/123?utm_term=baywatch+2017+theme+song
    • https://bivejeweki.weebly.com/uploads/1/3/4/3/134322338/725851.pdf
    • https://cdn-cms.f-static.net/uploads/4466659/normal_600d5acdce506.pdf
    • https://cdn.sqhk.co/fejukomus/hijfIgj/36103033755.pdf
    • http://kafujaguvo.mygamesonline.org/fubowurumokonokizaz.pdf
    • https://cdn.sqhk.co/pasudajuwesa/APodeic/viggle_app_crashing_iphone.pdf
    • https://static.s123-cdn-static.com/uploads/4366947/normal_5fc93c540b7aa.pdf
    • https://cdn.sqhk.co/mogizilo/hjjdijJ/69415777395.pdf
    • https://cdn-cms.f-static.net/uploads/4448540/normal_60133710b7a72.pdf
    • https://dunebuka.weebly.com/uploads/1/3/2/6/132682868/76435eb2f173c.pdf
    • http://xofajenakimexo.iblogger.org/32354215113.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://noxuzor.rf.gd/88350512087.pdf
    • http://sipanokule.onlinewebshop.net/vetazavijenisoxemuk.pdf
    • http://zusewijoje.epizy.com/free_business_card_templates_for_catering.pdf
    • https://s3.amazonaws.com/baxadelefofibuz/96164246567.pdf
    • https://s3.amazonaws.com/sewamos/photo_editor_by_aviary_app_apk.pdf
    • https://s3.amazonaws.com/jinabom/88549946592.pdf
    • https://s3.amazonaws.com/xuxifuzituwu/manual_traduccion_ingles_espaol.pdf
    • http://jetumodegupejit.rf.gd/fire_alarm_inspection_report_form.pdf
    • https://s3.amazonaws.com/bogijexu/advertisement_template_google_slides.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_off0000e16b.bin
be1293ca5dba026e4cb01b090d4d8195e59657a4bdeaccfa818535fba0afb235
pdf-font-stream PDF embedded font (sfnt) at offset 0xE16B 5472 bytes
font_01_sfnt_off0000f403.bin
9b4e948a478c2036950fb175c1be2ad36e02b8effd08e5900e139f7cf599e0f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF403 11232 bytes
font_02_sfnt_off000119e5.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x119E5 4324 bytes