Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66dcfff403d15a9…

MALICIOUS

PDF

108.1 KB Created: 2021-04-11 01:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0beca3a8f6f97cb861a74a27e6ca605e SHA-1: 9a782efa0f938be6239bf107cecda7ed30f24c0e SHA-256: e66dcfff403d15a9a3e0a072cf024cbf7a4b9fe6746eefbb1417f9650da2737c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a phishing lure related to 'special forces pay'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or scamming purposes. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/strik?utm_term=how+much+do+special+forces+get+paid+uk
    • https://bemakidej.weebly.com/uploads/1/3/0/7/130739127/kinuwazawumibaleta.pdf
    • https://metipejoxeve.weebly.com/uploads/1/3/4/7/134725173/1210882.pdf
    • http://sale50.pro/adobe_writer_for_windows_10nhgfs.pdf
    • http://zesamoa.online/how_to_proper_use_yes_in_a_sentencewxmvq.pdf
    • http://kieverts.xyz/baharo_phool_barsao_mera_mehboob_aaya_hai_song_download48qrm.pdf
    • http://xafesuvorolivig.scienceontheweb.net/xawizuwi.pdf
    • http://tibudirowe.mygamesonline.org/57991820028.pdf
    • https://vapigoje.weebly.com/uploads/1/3/5/3/135391726/rusowokumibuvubitewe.pdf
    • http://madamzero.com/carnal_knowledge_and_imperial_power8ro8s.pdf
    • http://gexopidikimo.mygamesonline.org/qasida_burda_sharif_book.pdf
    • http://phtech.site/pawozamifaxuki2k7zn.pdf
    • http://tronreserve.online/5052737407972jd6.pdf
    • http://peuer.xyz/xezomisevovekiwutln3.pdf
    • http://roselosudeve.sportsontheweb.net/kotuzosumazatalemuvan.pdf
    • https://galofufe.weebly.com/uploads/1/3/1/3/131384583/xuwumuvapugomop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rakabexozu/aadhar_card_application_form_online_apply.pdf
    • https://s3.amazonaws.com/bokofapig/50280094500.pdf
    • https://s3.amazonaws.com/genedesowul/zogit.pdf
    • https://s3.amazonaws.com/tapelu/57742210800.pdf
    • https://s3.amazonaws.com/rufonali/dijaxoduxogeludava.pdf
    • https://s3.amazonaws.com/rabewiruzitewa/cercle_de_la_forme_bastille_planning.pdf
    • https://s3.amazonaws.com/wizuluworafid/how_much_is_50_1_fuel_ratio.pdf
    • https://s3.amazonaws.com/tawosutosuxi/facebook_sign_in_api_android.pdf
    • https://s3.amazonaws.com/memexelu/78038111186.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000168a7.bin
d55374beb764adc6c7b90f4e0f1bbbfee9286efa5d88e987a26835fcd46479ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x168A7 5684 bytes
font_01_sfnt_off00017be6.bin
5f3f67c4acde2674a4db9f2d317e9d17191f4204d584ff9228b9162bb4b8a217		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17BE6 11404 bytes

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