Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebdeff4b813573f…

MALICIOUS

PDF

87.8 KB Created: 2021-04-04 23:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 042acf6dd8ad9f0626634b09040be35a SHA-1: b08a4d3d1b2de054646780115c8594bf3cb8400c SHA-256: eebdeff4b813573f73bba534720892bdbc9bdb98687bd22104d1e8a8bfc9f57a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://maypoin.ru/strik?utm_term=child+labour+short+story+in+english PDF link annotation
    • http://fuwiduwoxobol.mygamesonline.org/el_guardian_entre_el_centeno_capitulo_11.pdfIn PDF document text
    • http://kedepoba.sportsontheweb.net/97160358356.pdfIn PDF document text
    • http://dobofozepop.mygamesonline.org/is_death_note_a_netflix_original.pdfIn PDF document text
    • http://gusanod.22web.org/milewafewevowopida.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/arterias_y_venas_del_cerebro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380090/normal_5fef6427de05f.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/biagcNZ/mujixerikawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471704/normal_5fd73a609d88f.pdfIn PDF document text
    • http://xafomona.mypressonline.com/vidyasiri_application_form.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/dTjgHtB/gunerif.pdfIn PDF document text
    • https://cdn.sqhk.co/koxuvusu/jcqCXAE/85286275849.pdfIn PDF document text
    • https://cdn.sqhk.co/dutimapo/csLThfK/88436699772.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/fjezide/zofovajudedotiwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/farokof/85178321240.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/furiwetadikoguvijujexuz.pdfIn PDF document text
    • http://vulikoviluxugu.rf.gd/5th_grade_math_practice_test_common_core.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/jozep.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/best_ringtones_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/58181542823.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D90 5236 bytes
SHA-256: 670e578a2311e799a825b8876e96e534128253d4757d58cfeba05defaf028066
font_01_sfnt_off00011f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F56 10760 bytes
SHA-256: 98ca3831439d05667758e65dd49171b3992c8d0319b039e59e65199ce3b5cc93
font_02_sfnt_off00014405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14405 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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