Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f2ec7de86688a6…

MALICIOUS

PDF

75.2 KB Created: 2021-03-05 23:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2d7ec88c89dd10fffeab380dd3fb5e70 SHA-1: 58373c8bb110d049b9ebdc4d6faa800c5ee798cd SHA-256: 12f2ec7de86688a6d4d8b444f433115a6a4cea8c09680597d6f2d0b90b03ee1d
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a malicious redirector link, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic suggests a social engineering lure to trick the user into clicking the link. ClamAV detection further confirms the malicious nature of the file, classifying it as 'Pdf.Phishing.Trojan'. The embedded URL leads to a known malicious domain, indicating an attempt to deliver a payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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
  • 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://yafferge.ru/strik?utm_term=the+royal+road+to+card+magic+pdf+download In PDF document text
    • https://static.s123-cdn-static.com/uploads/4475215/normal_6001e49212229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482023/normal_5fe6fbd77c9b2.pdfIn PDF document text
    • http://dfds.in/fufukarevudajiwogizupirom2xv0.pdfIn PDF document text
    • https://vurejubi.weebly.com/uploads/1/3/1/4/131454114/pizewebisopiwiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446270/normal_5fd68454d1a54.pdfIn PDF document text
    • http://ita-women.space/67580392726r3wqg.pdfIn PDF document text
    • https://maviruwatibifiw.weebly.com/uploads/1/3/4/4/134490209/nuxogimezir-nofiramoxufij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_603759170ffff.pdfIn PDF document text
    • http://sushibara.net/ludo_king_play_online_pcq1ist.pdfIn PDF document text
    • http://academic-club.ru/how_to_hook_up_vivint_thermostath02l6.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/99ac7809-4028-41cc-86d8-85016a34d9d2/how_to_use_onn_earbuds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6b5c084-3df6-42c1-8963-40c67e660177/dekosiwajuvowexid.pdfIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_6c22c17957484312aa70a785d1bd4013.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe383fac-622e-4ba4-9406-f3cc2c4c907c/vezuvenipabuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c49518a-bf99-4d27-be42-14200121a223/zageb.pdfIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_b1c02090d80046ba9c06996869f92bc1.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D8 5536 bytes
SHA-256: 0d566f728795a7fda558e1269f7c9981bd425cb65109c4342be3e02c39d8a5ab
font_01_sfnt_off0000f999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF999 11344 bytes
SHA-256: 4369031df312cbf0d0e478dc6974f6e13096934f43bf85f330c7bb6872f83207

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