Malicious PDF — malware analysis report

Static analysis result for SHA-256 e57cf62ef705780e…

MALICIOUS

PDF

84.5 KB Created: 2021-03-10 16:06:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 01f18f1dc2e84c8c7cd3452c3e6adc78 SHA-1: 4fed78f6d76ee463a73f54de7ff31a4eb2a653e9 SHA-256: e57cf62ef705780ebe39d6b9c2ca2c5f048f4d4581ca24861bb475ccec58b737
214 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and ML classifiers, and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL points to a suspicious domain, likely part of a phishing or malware distribution scheme. While no scripts were explicitly extracted, the nature of the PDF and the malicious link suggest an attempt to lure the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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.
  • 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://dafemum.ru/123?utm_term=1st+carnatic+war+information In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421934/normal_602597504ce65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417536/normal_604840f32cbda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413236/normal_603163c08e430.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408873/normal_5fec79aab0206.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cfff6b0e-fc0f-4d9c-a983-c0e60c8b2bfd.filesusr.com/ugd/c637e3_3e33523d78be4d11aa2b999e79323d7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/cambio_climtico_en_mexico.pdfIn PDF document text
    • http://nifopufu.epizy.com/fl_studio_mobile_mod_apk_download_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/nitujikixebulogogakejota.pdfIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_0fb12f2006e64afa92053180a2f403fb.pdf?index=trueIn PDF document text
    • http://motinekan.epizy.com/salisogose.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/11028840137.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/aprender_ingles_basico_gratis_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/as_valkrias_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/australian_visa_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/2005_dinghy_towing_guide.pdfIn PDF document text
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_95e5e33e0bb549b7b7bd9de7ea9343f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kumasala/kuxukoxezadoxiwukik.pdfIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_7a6bdf0158354471903c8388eee5e45f.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EE 4716 bytes
SHA-256: 6ee59ddd193d6ccf6e31ff5eaf0e37355a0734ec9b60335711dcf4b39675ce0e
font_01_sfnt_off000102d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D4 10908 bytes
SHA-256: e6f19c79be2f84d4567eaa3fbfe3901abea89d196ddf0febc542d27914bf7247
font_02_sfnt_off00012793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12793 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
font_03_sfnt_off00013556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13556 6084 bytes
SHA-256: 0bbd385887db5074fbd87256d70f98a882c9353f1362fd6c1377f0ce146e0394

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