Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c26afcb629c0d5e…

MALICIOUS

PDF

70.8 KB Created: 2021-05-01 00:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 57f60131dcc81555dd84d6e65c38b238 SHA-1: 42df375b1e1dce38f4740da5fa96f1cdf1fb6f2d SHA-256: 4c26afcb629c0d5eee2c94ad536cc2b06ed2610f8386290c360c3094cbfb01ab
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, 'maypoin.ru', which is likely used to host a malicious payload or phishing content. The document body, though heavily obfuscated, suggests a lure related to software, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9879

Heuristics 4

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://maypoin.ru/strik?utm_term=simcity+4+deluxe+edition+cambiar+idioma PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fc7c391e7af8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373755/normal_6006ac58a3591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_601af622783d2.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/idBhdjd/fovudepuwuxuga.pdfIn PDF document text
    • https://cdn.sqhk.co/mepetiruzi/hhJfhjc/91459985804.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366993/normal_5fce9d82c59ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462073/normal_6040128996269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476421/normal_604d112ba922d.pdfIn PDF document text
    • https://cdn.sqhk.co/nemoludajedu/etwiAx1/nufezalib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_60164654a27ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444655/normal_5ff2984fe5925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_6019f90ba1ad9.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/40261378-52dc-411b-b114-55e5b3e90f66/ti_84_plus_ce_free_download.pdfIn PDF document text
    • http://xamopalamusep.rf.gd/fisidumumasovej.pdfIn PDF document text
    • http://nitiparavedo.epizy.com/78253880432.pdfIn PDF document text
    • http://xaramoturowuf.rf.gd/kunanekunimom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0becf79a-4369-48b4-96cb-a04552ab7891/water_heater_not_turning_on_automatically.pdfIn PDF document text
    • http://vapomogabu.epizy.com/82580181421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32e11c6-167d-43ee-bfca-21243bcd1cb8/how_to_start_a_romance_fictional_narrative_story.pdfIn PDF document text
    • http://nejexapef.rf.gd/22829934007.pdfIn 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_off0000ddff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFF 5408 bytes
SHA-256: a7534c1367aa4e3288a19800057375326cbecd1faa9b584112b6723ad5d63c9d
font_01_sfnt_off0000f064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF064 12092 bytes
SHA-256: d7d328df61bbc78f36a7562cf6b23931b2e065bc2f331d9936535aa4ae42b4c6