Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ba30a1f50de571…

MALICIOUS

PDF

88.4 KB Created: 2021-05-17 22:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f99b1561202c9e83912ffdbdf552b8db SHA-1: 980006aa7226bde37ea095f6079b516c5fea32a6 SHA-256: 03ba30a1f50de57195fcaac2a08e02214e75eb86382ed0ce565ef670cb4b5206
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on file-sharing services, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of techniques used to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://fokemale.ru/strik?utm_term=what+is+the+rarest+mbti+type PDF link annotation
    • https://vifexaxelis.weebly.com/uploads/1/3/4/4/134482988/zaforevig_kipugot_gaxaxiv.pdfIn PDF document text
    • https://kuxanumukamizat.weebly.com/uploads/1/3/4/4/134489101/wagiz-xadebamijafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_5fd8b97edb00a.pdfIn PDF document text
    • https://masezinonorokun.weebly.com/uploads/1/3/4/6/134685416/nefopaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411937/normal_5fccd84b97b20.pdfIn PDF document text
    • https://zixikaro.weebly.com/uploads/1/3/5/3/135301636/876dfecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379236/normal_600a5aa5a98e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464524/normal_60542fdedb4ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528915/normal_600b0ed7261ce.pdfIn PDF document text
    • https://katalajoguv.weebly.com/uploads/1/3/2/7/132740778/nuvapepabixenowasil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabisuluro.epizy.com/apache_poi_3._17_free.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/tufogupowivu.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/97014636996.pdfIn PDF document text
    • http://suzibebozodumi.epizy.com/wuwuzodegimutuxudilodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb8d035-6982-40f6-8fb7-623c99d70ad1/fasedugel.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/43258659901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda1d4ac-4246-42d7-bc8c-3296e72fb7fa/58791904511.pdfIn PDF document text
    • http://degefoxovovi.epizy.com/bose_universal_remote_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/dot_plots_and_histograms_practice_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/dell_optiplex_755_sound_drivers_windows_7_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/ambari_kannada_movie_full_hd.pdfIn PDF document text
    • http://sulonofanez.rf.gd/bajaj_allianz_life_insurance_claim_form.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_off00011aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEC 5284 bytes
SHA-256: d702434cf2bfae6a1284002a3de16b26b7e53a0f504419c53a5507ec009b9caa
font_01_sfnt_off00012cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC7 11352 bytes
SHA-256: 5dc502931ff04d7a723780fca12de27b833d0cb7fa35de51a83a2a206535fefc

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