Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e9b68714eb1191…

MALICIOUS

PDF

78.5 KB Created: 2021-02-25 01:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ee2bfdf9ad055a1b4ea53faeac1fa0fd SHA-1: 599c7584c66a95bfccc477855b2acf40a453d700 SHA-256: 32e9b68714eb1191d74d4dd2b28fca122e241d67794f8a5e9d5672ebfff43728
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru', suggesting a phishing or scam lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the malicious nature by indicating a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/aws?utm_term=how+to+prove+it+a+structured+approach+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481168/normal_602590e891da3.pdfIn PDF document text
    • https://xubejuvanexog.weebly.com/uploads/1/3/5/3/135311054/xetebowaberunu-sesakosaterala-kirasuguvuros-wuwevetil.pdfIn PDF document text
    • https://rilawexiretik.weebly.com/uploads/1/3/4/2/134267086/kupexosajejigo.pdfIn PDF document text
    • http://kufemotobenin.66ghz.com/64251327233.pdfIn PDF document text
    • http://topplafond.xyz/a_level_past_papers_physicsbe7fb.pdfIn PDF document text
    • http://gratoraama.space/nicholas_sparks_novels_in_chronological_orderi0pzm.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/vamenaxakan.pdfIn PDF document text
    • http://makeyourself.xyz/weather_theme_activities_for_preschool1js9i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duwudipifajekod.rf.gd/25142075085.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/app_cloner_apk_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/emotional_intelligence_appraisal_test.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/kad_emule_lista_aggiornata.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/42236151028.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE51 5240 bytes
SHA-256: 290700bc61841917556b9c70a1a6d3534e3e320d16de0f0d0344c174f466c4a4
font_01_sfnt_off0000f02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02E 11468 bytes
SHA-256: d376c0ac51f226187c8acaa4ab2698e92ff0b2bdc8c91ca8e41dc263b3951f63
font_02_sfnt_off00011779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11779 16188 bytes
SHA-256: 405f40d6723f70924f0d15cee4af9ba7011d418d4c878c9ce7c4636facd7da5f

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