Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e5edd59ee16226…

MALICIOUS

PDF

81.6 KB Created: 2021-03-23 02:37:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bec00d20f738db14ef9f460c20a1a13d SHA-1: 74836e54e71e255b59447b13b4681bed09d29f8b SHA-256: 19e5edd59ee162264f8be0ef3c45df60063ee4fa294f544c9f6edeefaa4718ff
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant heuristic firing indicating a 'PDF_SEO_LINK_FARM' that generates many links. The document body, though heavily obfuscated, contains keywords related to medical conditions and the tool used to generate the PDF, suggesting a lure. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/award?keyword=accidente+cerebrovascular+fisiopatologia+pdf+2020
    • https://cdn.sqhk.co/bedimiwojam/OhfGgcs/razetasoparupiwejoxe.pdf
    • http://pugisapi.mypressonline.com/shrimad_bhagavad_gita_gujarati.pdf
    • http://wufamega.scienceontheweb.net/7519888453.pdf
    • https://cdn-cms.f-static.net/uploads/4490754/normal_603f2c2c2958e.pdf
    • https://static.s123-cdn-static.com/uploads/4408719/normal_5ff845c590242.pdf
    • https://static.s123-cdn-static.com/uploads/4391317/normal_6008f00f300ab.pdf
    • https://cdn-cms.f-static.net/uploads/4402745/normal_60331aa7d67e8.pdf
    • https://cdn.sqhk.co/xewiliwilax/Jhbhage/hip_hop_music_dance_meaning.pdf
    • https://cdn.sqhk.co/senuziker/kjchagf/most_beautiful_wallpapers_for_phone.pdf
    • https://cdn.sqhk.co/mizogujuzo/Xjcgehg/7532608808.pdf
    • https://cdn.sqhk.co/rosafipex/ihdhIgh/96373829185.pdf
    • https://cdn.sqhk.co/sirejeforox/UFvi7hr/67212954078.pdf
    • https://cdn.sqhk.co/nedovipirumu/vpKxgjQ/animal_crossing_wii_hair_guide.pdf
    • https://cdn.sqhk.co/sategexarom/jeghgdC/run_sausage_run_age_rating.pdf
    • https://cdn-cms.f-static.net/uploads/4476147/normal_5fea3cbcd421d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_c6bc1ae5f8c04821bf8cad6ea7b2ca61.pdf?index=true
    • http://vekamodadon.onlinewebshop.net/adjektivdeklination_deutsch.pdf
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_42a4d90320894fbeb59b10aaf2779140.pdf?index=true
    • http://nujugeteteda.myartsonline.com/how_long_should_you_study_for_the_teas_test.pdf
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_17c9e0d090024e7cbb21a18e706bc42b.pdf?index=true
    • http://jokubamobivavum.onlinewebshop.net/73592158190.pdf
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_302258298bd44f649130d13b0975caff.pdf?index=true
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_004384f1b7c04f0884abd4ccd2b97af3.pdf?index=true
    • 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_off0000fe4d.bin
9ccc3fe0ac5fc669b98cebb234c7e26c1cc89733ac24d8a62daae32beb946f5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4D 5784 bytes
font_01_sfnt_off00011213.bin
a1c1c3bc3da10d444aff9069833fbb0f9e0ffc14fa5dc5b3b1ddd138cd115e9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11213 11776 bytes

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