Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3da9c6c9b4bd02c…

MALICIOUS

PDF

99.5 KB Created: 2021-03-18 21:21:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d5d93a67007ccfc272ae3525c5290b97 SHA-1: b4bb6d8c2ed35cf8fc235fa684f6746a38bfee54 SHA-256: d3da9c6c9b4bd02ca17f2c4dcf9e477597086e71257951541560a48f0ee5ce9a
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an external URI and an SEO redirector link pointing to 'https://lozipotod.ru/strik?utm_term=thompson+center+renegade+54+cal+load+data', suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to potentially harmful content.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=thompson+center+renegade+54+cal+load+data PDF link annotation
    • http://pokavitapizinuv.iblogger.org/calculus_continuity_worksheet_with_answers.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/foxeruvulupugobunajadil.pdfIn PDF document text
    • http://dobilarujokux.sportsontheweb.net/bitsat_2020_syllabus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402722/normal_602e5ab217bf0.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/pirosawadazemilus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384835/normal_5fee61f24bd41.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/69387098501.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402706/normal_5fe16ee12d65d.pdfIn PDF document text
    • http://lololuvipukaji.iblogger.org/kayla_bikini_body_workout.pdfIn PDF document text
    • http://xuputunoxukir.22web.org/kigudijup.pdfIn PDF document text
    • http://rejawulomov.mywebcommunity.org/japanese_learning_book_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/phonics_worksheets_free.pdfIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_df241e2bc58f4f08bdb59814efe996b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/how_to_pass_texas_dps_written_test.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/brochure_template_tri_fold_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/52386278028.pdfIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_c2906f1afef842f7baee312683cbe8de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/sisozaxibubigarup.pdfIn PDF document text
    • https://64f3f273-fd79-4cea-bc15-92b2431614e2.filesusr.com/ugd/542254_4d4ad11aa244482c8d17514b718cf5c6.pdf?index=trueIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_e1fb3dbc1ebf45eab141c25121bf9651.pdf?index=trueIn 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_off000144a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144A4 5648 bytes
SHA-256: 99488ff954fd31fe08ae8efe514b7c4372dd7dfed0ff34f20807c43593d4eb8f
font_01_sfnt_off000157af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157AF 12280 bytes
SHA-256: f2f0fa1be6ea39a04467c71a8b09318de72e045e541a0a73414ffeb8d224ecd7

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