Malicious PDF — malware analysis report

Static analysis result for SHA-256 4449af6e7ddf8932…

MALICIOUS

PDF

193.9 KB Created: 2021-03-18 23:51:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6635b1ba8206654e1874460e427e3c3f SHA-1: a35cb0cfbc20c8a87665cbe1a5f0fe911bc81a65 SHA-256: 4449af6e7ddf8932abed0f04b1d235bed395bd220a1d560aa4163d549122d7bc
126 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to search terms, further supporting a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

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://druttle.ru/award?keyword=argala+stotram+in+bengali+pdf PDF link annotation
    • http://suvonenexazu.mywebcommunity.org/kexurokijarezidifasavek.pdfIn PDF document text
    • https://janirakuvofubej.weebly.com/uploads/1/3/4/7/134734148/991b9427dd66bfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487935/normal_6003be717e30e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473053/normal_5fec02c2e2efa.pdfIn PDF document text
    • https://vagipirisixo.weebly.com/uploads/1/3/4/8/134861957/640ec86ae.pdfIn PDF document text
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/08c58.pdfIn PDF document text
    • http://ribadubeko.scienceontheweb.net/2177126674.pdfIn PDF document text
    • https://cdn.sqhk.co/gunumiku/gjanPCV/pirokavipubituwini.pdfIn PDF document text
    • https://finijigif.weebly.com/uploads/1/3/2/6/132681422/1970818.pdfIn PDF document text
    • https://zapirugitoz.weebly.com/uploads/1/3/4/5/134508168/1cd7c2528bbf834.pdfIn PDF document text
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/bojogop_bumoxutoj.pdfIn PDF document text
    • http://venolilixe.mygamesonline.org/mercury_15_hp_four_stroke_owners_manual.pdfIn PDF document text
    • https://wulakeda.weebly.com/uploads/1/3/4/5/134592464/napovetefuwubu_bojuvotibore_lidupu_narun.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/eNuhhha/sobijapunenovupatatimek.pdfIn PDF document text
    • https://gubagomokugexat.weebly.com/uploads/1/3/3/9/133988684/5358311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463788/normal_5fdbcc18cebfc.pdfIn PDF document text
    • https://cdn.sqhk.co/gojapawareke/iTgehew/73106720763.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/77722a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493200/normal_6005f60184e8c.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/15914247897.pdfIn PDF document text
    • http://dobofozepop.mygamesonline.org/xokubimeleperutufa.pdfIn PDF document text
    • https://cdn.sqhk.co/turogepufe/nghq0Ad/learn_palmistry.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_1107f5ece0244470a85b8f50301cef58.pdf?index=trueIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_7fa550a34e7248cf98dc1b1377bbd35f.pdf?index=trueIn PDF document text
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_fd3bd47c4a3249459408adb602a5165b.pdf?index=trueIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_ca16e7db74de4b99ac862d7628e6accc.pdf?index=trueIn PDF document text
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_dee548bbbd9146368c0808ebf82074d4.pdf?index=trueIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24CD6 5492 bytes
SHA-256: b4c4b1a504effea29db5570ad321ecb31ff9971e93f15015123ceb997d75c25c
font_01_sfnt_off00025f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25F63 42796 bytes
SHA-256: 00b165b389067842d79c87d1945ee88fe5d412f78e19677181f315049713b677
font_02_sfnt_off0002c233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C233 11468 bytes
SHA-256: 1e23e4fe07df16a902726b1268d92d21eec350e402971e97e1afa64f1ee16640
font_03_sfnt_off0002e98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E98C 4400 bytes
SHA-256: dac29e6247adceb1b3af7be77063e22b8a5777c84754d8000545eaedde974fcd

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