Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49619c55b0d924e…

MALICIOUS

PDF

76.6 KB Created: 2021-03-27 23:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2c036184908854435684ad0f0daf05c8 SHA-1: 57ccd0180cafbaf208ca669591bb333b8ed56429 SHA-256: e49619c55b0d924e768c39f15dc80d672aacab2ba20a047f1a56a8ddefde6de5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://mezovuduw.ru/123?utm_term=period+blood+off+white+sheets PDF link annotation
    • http://padlamadla.site/xutalobigatoki3c6n4.pdfIn PDF document text
    • http://novofikupeneda.mywebcommunity.org/alexandria_library.pdfIn PDF document text
    • https://wemuxafav.weebly.com/uploads/1/3/4/8/134860001/4370b5671962b45.pdfIn PDF document text
    • http://rabota-plus.club/the_boy_in_the_striped_pajamas_movie_plotkgzj2.pdfIn PDF document text
    • http://bipufides.22web.org/zuveselajinuzaximo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_6059b3bee22b4.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/dobawiwagopalumigixeb.pdfIn PDF document text
    • http://fakoxipedobuk.22web.org/california_residential_lease_agreement.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_604d1772e6065.pdfIn PDF document text
    • https://ropexosuwewi.weebly.com/uploads/1/3/1/3/131380205/e31bad3.pdfIn PDF document text
    • https://babibogek.weebly.com/uploads/1/3/1/3/131379554/f69284.pdfIn PDF document text
    • http://bubble1.space/99207292272skoeq.pdfIn PDF document text
    • https://nawiveburejofi.weebly.com/uploads/1/3/1/3/131381882/28563.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/9f6762a5-3272-43ee-8367-77344d97f54b/samsung_washing_machine_repair_service_mangalore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13db3d5e-413b-4723-94ef-54a9c09bb491/kasilulogixegimejiz.pdfIn PDF document text
    • http://detekoxinusogux.epizy.com/ms_excel_functions_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a199e91-cf09-4b5a-acf7-b531255e226c/english_grammar_exercises_upper_intermediate.pdfIn PDF document text
    • http://timagugovoxo.onlinewebshop.net/guxoxidazaxad.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_off0000ef95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF95 5020 bytes
SHA-256: 759479ee1ecc02af7af9470833c5cf55d68289fc482026c77fc890de81a828f2
font_01_sfnt_off000100b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B1 10792 bytes
SHA-256: 16c364d0e0eb52a41fe4d63f89d33254c7d6d83bc38e8a2bd622532a5c5056fb

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