Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49f5916a30ea04b…

MALICIOUS

PDF

73.4 KB Created: 2021-03-20 12:36:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b27b97c386202e38e10f081f7c50c744 SHA-1: b7bf83a4d94022a0bfc83f15c301556959401421 SHA-256: d49f5916a30ea04bcad8a8981f9e8c538afdc13ff439e814e71ad85e1fa0483e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded URLs and the PDF structure strongly indicate a phishing attempt to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=2014+tamil+movies++in+tamilrockers+hd PDF link annotation
    • https://cdn.sqhk.co/zadoweferoxe/eggKjif/tik_tok_song_download_mp3_tamil.pdfIn PDF document text
    • http://dokarukaxita.22web.org/reloading_manual_hornady.pdfIn PDF document text
    • https://cdn.sqhk.co/dowamagova/c0VGJs9/62285110739.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/gi0C0if/zurujafupuxurawikusepe.pdfIn PDF document text
    • https://cdn.sqhk.co/lakarejof/Whfhlii/29236282697.pdfIn PDF document text
    • https://cdn.sqhk.co/zeritogekuja/ggg9HFe/nikon_d3400_camera_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/aUigsT8/ice_cream_flavours_name_in_marathi.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/mulerux/weekly_accomplishment_report_template_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f644b3-1780-4a3c-9017-368e5b0502a0/lewegik.pdfIn PDF document text
    • http://tawenaxogiminax.epizy.com/fifuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c805b0ba-f1ec-4074-9bbf-723a3cb2076b/meaning_of_traditional_musical_instruments.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/nazefubexuwiduk.pdfIn PDF document text
    • http://lawijiba.rf.gd/clinical_hematology_and_fundamentals_of_hemostasis.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/all_in_one_solitaire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be772ba-d989-4eb6-9ab9-a4887969b4af/mojuzuwigebivurezuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4024bc6-9891-4424-af47-ce4a0bce0420/nixon_watch_band_replacement_australia.pdfIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_39b33dca2ed040678528450715992322.pdf?index=trueIn PDF document text
    • https://86cafecd-0af7-43e6-b578-14605c742a6c.filesusr.com/ugd/c4ddd0_c59b453268f845a8a532c4dddf74e07d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/setigafat/paediatric_cardiology.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_off0000e101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE101 5620 bytes
SHA-256: af344f21b4f8db6c7d849c8c3ba0395e3073bf70fba0a598fe61c6c84651195c
font_01_sfnt_off0000f3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FF 10752 bytes
SHA-256: 7600863337cd3171790d581baf7cc668e1a2309caee001528df2d121f059ff96

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