Malicious PDF — malware analysis report

Static analysis result for SHA-256 e36c3b1256a75109…

MALICIOUS

PDF

91.9 KB Created: 2021-05-24 08:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ee6c2991581e40d75e300f65bf69a85 SHA-1: e2a70d9326181f6af68ef267a8bacf471f2512eb SHA-256: e36c3b1256a7510957df782f074aced560aa713c04b6a4dbf23e0a54686402cf
104 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a distribution point for a secondary payload. The presence of a visual download button, though low-signal on its own, supports the overall phishing and malware delivery narrative.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=how+to+set+diablo+2+resolution
    • https://cdn-cms.f-static.net/uploads/4428038/normal_6029531f8faff.pdf
    • https://cdn-cms.f-static.net/uploads/4387235/normal_606b824a692a2.pdf
    • https://cdn-cms.f-static.net/uploads/4404313/normal_6027967956950.pdf
    • https://cdn-cms.f-static.net/uploads/4465703/normal_601254fe4b777.pdf
    • https://cdn-cms.f-static.net/uploads/4378857/normal_603d0fe34fe04.pdf
    • https://cdn-cms.f-static.net/uploads/4405654/normal_6029c32dea635.pdf
    • https://cdn-cms.f-static.net/uploads/4489414/normal_601d3681a40cf.pdf
    • https://cdn-cms.f-static.net/uploads/4415946/normal_600adc5a088d9.pdf
    • https://cdn-cms.f-static.net/uploads/4386087/normal_602f891c8abd7.pdf
    • https://cdn-cms.f-static.net/uploads/4426819/normal_6014d5076fe00.pdf
    • https://static.s123-cdn-static.com/uploads/4455884/normal_5fc96b9f0d28f.pdf
    • https://static.s123-cdn-static.com/uploads/4421040/normal_5fe03ecb3db72.pdf
    • https://cdn-cms.f-static.net/uploads/4483337/normal_6054f0791b4cb.pdf
    • https://static.s123-cdn-static.com/uploads/4379387/normal_5ff77f63eae92.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f6ef3447-157a-4c69-b344-f6e119e0a065/supewijetasifaletusofefa.pdf
    • https://uploads.strikinglycdn.com/files/7501e909-e804-4ce1-bffb-29654f3cc321/roland_v-4ex_price.pdf
    • https://uploads.strikinglycdn.com/files/dde8dcfc-814b-4dba-a228-b398424f6fd7/77704672548.pdf
    • https://uploads.strikinglycdn.com/files/d46a4422-a247-4375-9e12-c361ddc40fdf/tilegojubipedokalixumunud.pdf
    • https://uploads.strikinglycdn.com/files/a9d316ca-964d-4e78-a504-97427a9b767a/91085471346.pdf
    • https://uploads.strikinglycdn.com/files/ec1e18c0-ec9d-494d-aa9e-eaf13e9faf41/introductory_econometrics_a_modern_approach_6th_edition_ebook.pdf
    • https://uploads.strikinglycdn.com/files/5dea82b8-3e5e-48a1-b424-9f42a9a1b3a6/burilijosalitebu.pdf
    • https://uploads.strikinglycdn.com/files/e1360da5-75a5-4514-913c-3003bb2514a6/bowflex_treadclimber_tc3000_parts.pdf
    • https://uploads.strikinglycdn.com/files/6019ee0f-9a96-403d-8ae6-32cfa66f9624/fumesinimu.pdf
    • https://uploads.strikinglycdn.com/files/34800bdf-1780-41ea-a281-aece93b2a116/47239180215.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b2c.bin
efdde9a55a07f509b583b0a76e419023c6c63dc49b0f25a0d4bd67bb49d1c099
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2C 5024 bytes
font_01_sfnt_off00012c52.bin
567b965cb78808f31c15da1457a49ebe95796b3a3908259eeaec228a942e1585
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C52 11744 bytes
font_02_sfnt_off000153d0.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x153D0 4324 bytes