Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d679d07854df54…

MALICIOUS

PDF

80.8 KB Created: 2021-03-19 08:39:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 89ac91d28491623efd883b4de5f1222e SHA-1: 7333bc1971cb129cbb2c61ca45519236b64d7939 SHA-256: 68d679d07854df54b1e7896087d6bcc0f707ea8a2d74077a73cfbb3b0869d161
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 0.9998

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://mezovuduw.ru/123?utm_term=prevencion+del+alcoholismo+en+adolescentes+pdf PDF link annotation
    • http://jerijoba.iblogger.org/agriculture_vector_free.pdfIn PDF document text
    • http://rudovatimokasum.medianewsonline.com/physical_description_flashcards.pdfIn PDF document text
    • http://itclick.pro/subtracting_fractions_worksheets_with_answersi19zc.pdfIn PDF document text
    • http://experiment.website/kirby_g10d_service_manualr02ct.pdfIn PDF document text
    • http://mamontov-net.cc/727451326953uo5k.pdfIn PDF document text
    • http://profibrend.ru/39843789775tb0w8.pdfIn PDF document text
    • http://fesavuxofogegil.iblogger.org/victa_2_stroke_carburettor_manual.pdfIn PDF document text
    • http://roskycnmx.com/elisabeth_kubler_ross_grief_quotesojv3g.pdfIn PDF document text
    • http://pesale.pro/8475178490382r2.pdfIn PDF document text
    • http://ital-girl.space/fantaisie_impromptu_partitiont46cv.pdfIn PDF document text
    • http://probmake12.xyz/534522800953xp9.pdfIn PDF document text
    • http://bukuxojunuz.mypressonline.com/afzelia_quanzensis.pdfIn PDF document text
    • http://neuroncraft.online/acca_reduced_subscription_form_20188w5yi.pdfIn PDF document text
    • http://xugaguf.mypressonline.com/bivanagiped.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/6722974775.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mugafazeporose.epizy.com/cheer_uniforms_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e47a12-227e-46d9-ada3-def18efd786d/syma_s111g_helicopter_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/543f5e49-1d96-407f-a655-368b50371533/43655897632.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_off0000fbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAD 5456 bytes
SHA-256: 77f2ca984c8508b2d6e467ec3ff91d14778d3a43167075c5a374d579b41990b7
font_01_sfnt_off00010e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E19 11856 bytes
SHA-256: f3e7f1f9908ed011ec4a4aa7de8f307ca628b1f909e998db2a7769d1c5bb3d93

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