Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f7c3f4898519aa…

MALICIOUS

PDF

68.9 KB Created: 2021-02-13 01:06:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00580698fb0180b6d04a0b0cd1e039cc SHA-1: 9221ffc698cb79ba489e85fdfb9767c356a86efd SHA-256: 03f7c3f4898519aa641918415643de1817d855b75920e084a255f93442eca0b8
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. It contains numerous external URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the lure aspect.

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://druttle.ru/wix?keyword=center+redemption+inc+dubuque+hours PDF link annotation
    • https://cdn.sqhk.co/labojime/iBoighe/29923060024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_6021f29bd830a.pdfIn PDF document text
    • http://bofitek.iblogger.org/cheeni_kum_320kbps_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/jidgdif/create_roku_account_without_credit_card.pdfIn PDF document text
    • http://sizegivip.22web.org/tamilrockers_new_tamil_movies_free.pdfIn PDF document text
    • http://kibizife.iblogger.org/dubibikabulaput.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafevudivexer.rf.gd/ewg_guide_to_baby_products.pdfIn PDF document text
    • http://kejidexod.epizy.com/ftb_applied_energistics_2_guide.pdfIn PDF document text
    • http://miloxirabufa.epizy.com/bertie_botts_every_flavor_beans_color_guide.pdfIn PDF document text
    • http://kesabiladid.rf.gd/bounce_masters_apkpure.pdfIn PDF document text
    • http://mifijikamipupu.epizy.com/32984208672.pdfIn PDF document text
    • http://wodefelid.rf.gd/32760300408.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/breastfeeding_jaundice_nice_guidelines.pdfIn PDF document text
    • http://detotoga.epizy.com/zujifadebeparitunusugelom.pdfIn PDF document text
    • http://pasivete.epizy.com/all_live_tv_apk_for_android.pdfIn PDF document text
    • http://sorajapiliwixod.rf.gd/vegas_pro_14_free_32_bit.pdfIn PDF document text
    • http://butadiviwev.rf.gd/53037686565.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_off0000d14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14A 5244 bytes
SHA-256: 8c212f7333cb40b3e9ca5c3fb4069aea4dae5ae98cebfa41e22bf0debadd15ed
font_01_sfnt_off0000e2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E5 10412 bytes
SHA-256: 3b778b0d058fb3955a5f963cdbe33b00963b1256dd6b5b15ac83bc1e570e6798

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