Malicious PDF — malware analysis report

Static analysis result for SHA-256 e832d9d568907e74…

MALICIOUS

PDF

77.6 KB Created: 2021-04-08 16:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 74a058868b458bb8b45c316fdf7a680c SHA-1: 76d2b3bc9a0dc21b3d1b2186cfd526b3f8ea1e7f SHA-256: e832d9d568907e74b1fc744a96f739df485d913a60aa561b0db5f00ec5a000a8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to the URL's content, suggesting a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=ensayo+de+el+libro+la+metamorfosis+de+franz+kafka In PDF document text
    • http://kogemotuju.getenjoyment.net/why_do_certain_websites_not_load_on_my_computer.pdfIn PDF document text
    • http://vakotuwudar.22web.org/banking_regulation_act_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f825e96-b30b-4a06-a34b-0a810e7ac570/92421328774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a9797b-6bed-4065-be17-0503415ab9de/easiest_payday_loan_to_get_accepted.pdfIn PDF document text
    • http://ravesuvanobil.epizy.com/street_fighter_4_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/9593661741.pdfIn PDF document text
    • http://gazinuxifo.epizy.com/52272628788.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/spain_visa_form_sample.pdfIn PDF document text
    • http://nubaletafo.epizy.com/satezida.pdfIn PDF document text
    • http://boripodadup.epizy.com/russian_alphabet_pronunciation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ef4bf8-486b-413b-a6a5-07917e9baab7/lavitodezagenedu.pdfIn PDF document text
    • http://tofupewo.rf.gd/bipanevamubaf.pdfIn PDF document text
    • http://gomugugagaf.onlinewebshop.net/fusionner_un_en_ligne.pdfIn PDF document text
    • https://94ac7338-8c66-48ed-b7e4-01cccba3eff0.filesusr.com/ugd/9b8421_dadbc7ceeb00406ab176dbc3065cf17c.pdf?index=trueIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_bc053939d3404b9082ea1f16797be17e.pdf?index=trueIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_adf2647f6ecd430689756a336de7139e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/mevduat_bileik_faiz_hesaplama_forml.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/inches_to_decimal_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/how_much_does_gum_grafting_cost_australia.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_off0000f043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF043 5364 bytes
SHA-256: 24d2316c52d57cbc454d761887c71723e8f9e6500a4a3e2f4445bddccb7b23c4
font_01_sfnt_off00010282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10282 11680 bytes
SHA-256: 6b982bea3d859953f1c659a1d4317bc7ddeaa262d5817e5a9f94ccfae344505d

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